Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Alexander Dalloz]

Am 28.07.2018 um 00:09 schrieb Gordon Messmer:
Personally, I use SOGo (which also supports EAS).  It didn't get many 
mentions in the this thread, which is unfortunate because it's *really* 
good.


Please pay attention that you will have to pay extra for ActiveSync to 
Microsoft as SOGo does not cover that. Expressively documented by the 
project.


Alexander

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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Gordon Messmer]

On 07/25/2018 08:18 AM, Johnny Hughes wrote:

OK, what you say is true in theory.  However,  in Thunderbird on Linux
and using Mac clients, etc  .. and certainly on Windows workstation
clients using outlook .. zimbra does not work well.  It also does not
work well on people's smart phone calendars. People want their phone to
remind them of their appointments .. any solution that is iffy doing
that is just unacceptable in this day and age.



I'm not sure how long it's been available, but Zimbra supports Exchange 
ActiveSync.  Windows workstation clients using Outlook shouldn't see any 
difference between Zimbra and Exchange, if it's implemented properly.


Personally, I use SOGo (which also supports EAS).  It didn't get many 
mentions in the this thread, which is unfortunate because it's *really* 
good.


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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Keith Keller]

On 2018-07-25, Meikel  wrote:
>> [...] People want their phone to
>> remind them of their appointments [...]
>
> It's a generalization. Not valid for all people.
>
> Maybe SOME people want their phone to remind them of their appointsments.

And if some of those people are in your organization then you probably
need to support them.  You can't just tell them to suck it up just
because you want to use Zimbra (for example) instead of Google.  (If on
the other hand your bosses require you to host your data instead of
using Google then you may get away with telling them to suck it up.)

--keith

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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[David C. Miller]

- Original Message -
> From: "Johnny Hughes" 
> To: centos@centos.org
> Sent: Wednesday, July 25, 2018 8:18:18 AM
> Subject: Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based 
> SMTP Servers?

> On 07/19/2018 03:18 PM, David C. Miller wrote:
>> 
>> 
>> - Original Message -
>>> From: "Keith Keller" 
>>> To: centos@centos.org
>>> Sent: Thursday, July 19, 2018 11:33:17 AM
>>> Subject: Re: [CentOS] Which is better? Microsoft Exchange 2016 or 
>>> Linux-based
>>> SMTP Servers?
>> 
>>> On 2018-07-19, Mark Rousell  wrote:
>>>>
>>>> Well said. I feel that too many people today have forgotten (or, more
>>>> likely, never learned) these lessons from history. People give away
>>>> their personal and supposedly private information too easily and, I feel
>>>> certain, will come to regret it (some already have come to regret it).
>>>
>>> While I agree with the above, it doesn't really address Johnny's
>>> question, which is which open source calendaring projects can compete
>>> with Google calendar for users' ease of use?  If I give my users Zimbra,
>>> and they hate it, then what?  For simple email use, there are plenty of
>>> clients which can talk IMAP/SMTP to a linux server, but the options for
>>> calendaring (and ''groupware'' in general) are much sparser.
>>>
>>> It's a hard question, and each organization needs to weigh their privacy
>>> concerns against their users' requirements.
>>>
>>> --keith
>>>
>>> --
>>> kkel...@wombat.san-francisco.ca.us
>> 
>> Zimbra's calendaring component is also a CALDav compliant server. Users can 
>> also
>> share their calendars either via the zimbra web client(public, or restricted 
>> to
>> an email address with a password), or exporting the calendar to an ICS file.
>> CALDav compliant calendar clients like Apples calendar app on Mac and iOS can
>> subscribe or connect to the zimbra server using its 
>> https://zimbra.example.com
>> address. The Zimbra web client interface for using and managing calendars is
>> just as easy to use as googles calendars.
>> 
> 
> OK, what you say is true in theory.  However,  in Thunderbird on Linux
> and using Mac clients, etc  .. and certainly on Windows workstation
> clients using outlook .. zimbra does not work well.  It also does not
> work well on people's smart phone calendars. People want their phone to
> remind them of their appointments .. any solution that is iffy doing
> that is just unacceptable in this day and age.
> 

Yeah, I'm not saying it is perfect, nothing is. Zimbra standard also includes 
active sync so your iOS and android device can connect to it like if it was an 
exchange server. I have dozens of users doing that and the calendars work as 
intended. I also have a few dozen users connecting to our zimbra server via the 
Apple calendar program via CALDav protocol and although Apples program is not 
100% CALDav compliant it works fine for the things people actually use. They 
send invites and get reminders for events just fine. For our outlook users 
there is a connector that allows outlook to connect to our zimbra server as if 
it were an exchange server. I wasn't aware that thundebird had a calendar 
component but it works fine for IMAP and POP. I'm not saying it is perfect but 
if you have a mix of platforms like I do(Windows, Mac, Linux, android, iOS) and 
have to host the data yourself, I think Zimbra is a decent solution. That being 
said, I would prefer to use googles offerings. It would make m
 y job a lot easier. Being an email admin, dealing with spam/phishing/malware, 
maintaining security patches, OS updates, and hardware sucks.
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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Meikel]

[...] People want their phone to
remind them of their appointments [...]


It's a generalization. Not valid for all people.

Maybe SOME people want their phone to remind them of their appointsments.

My appointments are synchronized from owncloud to Thunderbird and to 
many (LineageOS-based) smartphones and tablets and >>I<< do NOT want to 
be reminded on the smartphones and tablets, but ONLY on Thunderbird 
desktop client.


Regards,

Meikel
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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Johnny Hughes]

On 07/19/2018 03:18 PM, David C. Miller wrote:
> 
> 
> - Original Message -
>> From: "Keith Keller" 
>> To: centos@centos.org
>> Sent: Thursday, July 19, 2018 11:33:17 AM
>> Subject: Re: [CentOS] Which is better? Microsoft Exchange 2016 or 
>> Linux-based SMTP Servers?
> 
>> On 2018-07-19, Mark Rousell  wrote:
>>>
>>> Well said. I feel that too many people today have forgotten (or, more
>>> likely, never learned) these lessons from history. People give away
>>> their personal and supposedly private information too easily and, I feel
>>> certain, will come to regret it (some already have come to regret it).
>>
>> While I agree with the above, it doesn't really address Johnny's
>> question, which is which open source calendaring projects can compete
>> with Google calendar for users' ease of use?  If I give my users Zimbra,
>> and they hate it, then what?  For simple email use, there are plenty of
>> clients which can talk IMAP/SMTP to a linux server, but the options for
>> calendaring (and ''groupware'' in general) are much sparser.
>>
>> It's a hard question, and each organization needs to weigh their privacy
>> concerns against their users' requirements.
>>
>> --keith
>>
>> --
>> kkel...@wombat.san-francisco.ca.us
> 
> Zimbra's calendaring component is also a CALDav compliant server. Users can 
> also share their calendars either via the zimbra web client(public, or 
> restricted to an email address with a password), or exporting the calendar to 
> an ICS file. CALDav compliant calendar clients like Apples calendar app on 
> Mac and iOS can subscribe or connect to the zimbra server using its 
> https://zimbra.example.com address. The Zimbra web client interface for using 
> and managing calendars is just as easy to use as googles calendars. 
> 

OK, what you say is true in theory.  However,  in Thunderbird on Linux
and using Mac clients, etc  .. and certainly on Windows workstation
clients using outlook .. zimbra does not work well.  It also does not
work well on people's smart phone calendars. People want their phone to
remind them of their appointments .. any solution that is iffy doing
that is just unacceptable in this day and age.




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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Gary Stainburn]

On Saturday 21 July 2018 21:08:59 Michael Schumacher wrote:
> folks, didn't anybody check the name of this guy?
>
> Turritopsis Dohrnii Teo En Ming 
> drops a bomb with provocative questions every now and then and NEVER
> ever responds to his own bullshit. He is just a troll!

This may be the case, but for me, who has been a sysadmin for longer than I 
care to admit, it has come up with some gems that I'm now looking into.
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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Dave Stevens]

On Sat, 21 Jul 2018 20:41:40 -0700
Keith Keller  wrote:

> On 2018-07-22, Valeri Galtsev  wrote:
> >
> > And on top of all: MS Windows is the only systems I know of whose
> > vendor tells you, it is not safe to run without 3rd party software
> > (antivirus).  
> 
> AFAIK (my son runs Windows, to my shame) Windows now comes bundled
> with antivirus software.  I have no idea if it actually works or not.

Yes, isn't it blatant? MS makes defective systems that attract
malicious software (viruses) then claims its anti-virus SW is an extra
added attraction. No doubt they monetize it somehow.Too baroque for me.

The apt cache description of xbill (qv) is just right: 

"Ever get the feeling that nothing is going right?  You're a sysadmin,
and someone's trying to destroy your computers.  The little people
running around the screen are trying to infect your computers with
Wingdows [TM], a virus cleverly designed to resemble a popular
operating system.  Your objective is to click the mouse on them, ending
their potential threat. If one of the people reaches a computer, it
will attempt to replace your operating system with the virus it
carries. It will then attempt to run off the screen with your vital
software."

Dave

> 
> --keith
> 

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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Keith Keller]

On 2018-07-21, Michael Schumacher  wrote:
> folks, didn't anybody check the name of this guy?
>
> Turritopsis Dohrnii Teo En Ming 
> drops a bomb with provocative questions every now and then and NEVER
> ever responds to his own bullshit. He is just a troll!

This is why I asked him why he multiposted to different lists: I saw the
same allegation in the Ubuntu group.  (Multiposting itself is one minor
sign of trolling.)

FWIW he did respond to a small handful of messages in this thread.

--keith

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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Keith Keller]

On 2018-07-22, Valeri Galtsev  wrote:
>
> And on top of all: MS Windows is the only systems I know of whose vendor
> tells you, it is not safe to run without 3rd party software (antivirus).

AFAIK (my son runs Windows, to my shame) Windows now comes bundled with
antivirus software.  I have no idea if it actually works or not.

--keith

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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Valeri Galtsev]

On Wed, July 18, 2018 11:42 am, Kenneth Porter wrote:
> On 7/18/2018 9:03 AM, mark wrote:
>> Based on experience at a number of jobs, Exchange may appear to be easy
>> to
>> configure, but as soon as you get past the utterly basic configuration,
>> when management or other departments want more, it then becomes a major
>> headache.
>
> I like to say that Windows is easier to install and initially configure,
> but Linux is much easier to FIX. Things will always go wrong.
> Closed-source Windows software hides everything and its GUI often lies
> about the true state of what's going on under the hood. Open-source
> software can be cracked open and I can dig down to root cause of any
> problems. Check out the free support forums at Microsoft. It's pretty
> hopeless. Responses to problems with open source software are generally
> much more informative. Open source advocates love to show off how they
> can fix problems. Closed source engineers aren't allowed to share
> solutions with the public. If you really want support, you're going to
> have to pay for it. So pay for the product, pay for the support, and nag
> them like you own them. Or go with open source and pay a consultant. (Or
> a hungry college student.)

And on top of all: MS Windows is the only systems I know of whose vendor
tells you, it is not safe to run without 3rd party software (antivirus).

Antivirus itself is fundamentally flawed idea: you can not enumerate bad.
You can enumerate good and prohibit everything else. So, antivirus is like
thinking backwards. (But given long record of MS in building poorly
architectured system, doing antivirus is sort of job security ;-)

Valeri


Valeri Galtsev
Sr System Administrator
Department of Astronomy and Astrophysics
Kavli Institute for Cosmological Physics
University of Chicago
Phone: 773-702-4247

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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Michael Schumacher]

folks, didn't anybody check the name of this guy?

Turritopsis Dohrnii Teo En Ming 
drops a bomb with provocative questions every now and then and NEVER
ever responds to his own bullshit. He is just a troll!

Michael

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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Kenneth Porter]

On 7/18/2018 9:03 AM, mark wrote:

Based on experience at a number of jobs, Exchange may appear to be easy to
configure, but as soon as you get past the utterly basic configuration,
when management or other departments want more, it then becomes a major
headache.


I like to say that Windows is easier to install and initially configure, 
but Linux is much easier to FIX. Things will always go wrong. 
Closed-source Windows software hides everything and its GUI often lies 
about the true state of what's going on under the hood. Open-source 
software can be cracked open and I can dig down to root cause of any 
problems. Check out the free support forums at Microsoft. It's pretty 
hopeless. Responses to problems with open source software are generally 
much more informative. Open source advocates love to show off how they 
can fix problems. Closed source engineers aren't allowed to share 
solutions with the public. If you really want support, you're going to 
have to pay for it. So pay for the product, pay for the support, and nag 
them like you own them. Or go with open source and pay a consultant. (Or 
a hungry college student.)



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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Valeri Galtsev]

On 07/19/18 09:14, Johnny Hughes wrote:

On 07/18/2018 04:05 PM, Valeri Galtsev wrote:



On 07/18/18 14:36, Johnny Hughes wrote:

On 07/18/2018 01:58 PM, Valeri Galtsev wrote:





But are you guys really telling you think the calendaring / scheduling
for individual users and the main corporate account, etc. .. are
working
well enough with any Linux solution.


I must confess, my servers are FreeBSD, but I'm quite sure the same is
doable easily on Linux.

We use for calendars Owncloud (may migrate to nextcloud in some future
to come). That authenticates against LDAP.


And does that calendar solution allow for things like:

1)  Allowing all users in the organization to see users calendars and
see when they are free to schedule a meeting with them.


Yes at least about a part of it: calendars can be shared with some
people or with everybody (which we didn't do, so I may be not 100%
presenting "experimental fact" here). Not certain about "free/not free"
mapped on calendars though.



2) Allow for designated people to schedule meetings for others (ie, your
secretary/office assistant can schedule meetings for people, etc.)


Yes, you can share calendar with anybody, and can set any set of choices

can read
can write
can "re-share" your calendar

You can share stuff to external people, and set individual
authentication for them independent of our system (in general, it is not
just calendars, but we use it for mostly synchronizing between all of
your devices, and also sharing: files, calendars, address book; it can
also be bookmarks, and there are variety of plugins expanding what else
can be accessed/synchronized via web/dav)



3) Allow a calendar to schedule shared items .. like meeting rooms,
shared vehicles, etc.  So that people can check those out for specifc
time windows, etc.


No, but for resource booking (if I read the question correctly) we use
mrbs (https://mrbs.sourceforge.io/). I know, that is not "integrated"
for you to have everything in one place. I never had time to look for
extention/plugin to suck from mrbs booked slot into one's calendar.



Those are just a couple of minor things a lot of solutions can't do

And do they work with imap, etc.


No, owncloud/nextcloud don't work with IMAP as far as I know. Mail
server is separate issue. Zimbra in that respect IS "integrated
collaborative environment". And so is Kolab. They both are lacking
per-user spam preferences. One more thing that added some minus for each
of them in my estimate what to choose is: behind each of them there is
commercial company. And that in my long experience significantly
increases the chance one day openly available incarnation of each may
become no longer available for us, and I will have to find replacement
in a rush and find the way to migrate to it, and the more sophisticated
the thing is, the trickier the migration will be.

My answers are mostly about owncloud which we use for quite some time.
Nextcloud is fork of owncloud, and to my regret nextcloud doesn't work
with postgresql, only with mysql/MariaDB, whereas owncloud works with
postgresql as well as with mysql/MariaDB (still we have some reasons to
migrate to nextcloud at some point).

I hope, someone with more knowledge will chime in.




Don't get me wrong.  I've run qmail, postfix, and zimbra mail servers
with IMAP, along with webmail front ends (roundcude, squirrel mail,
etc), for windows, mac and linux clients for several companies (all on
CentOS of course :D) .. I just don't think that calendaring that I have
seen is as user friendly as google calendar (for example).  But I'm all
for people running mail servers on CentOS (or any other Linux) if they
want !




Zimbra does not work very well with
Thunderbird and Lighting (for example) .. many solutions don't work with
Windows or Mac clients, etc.




For mail we use postfix, dovecot and maia for spam filtering (the last
harnesses spamassassin, clamav and few other things).

Of course, zimbra you mentioned earlier in the thread (or was it not
you?), and Kolab provide more corporate-like collaboration environments,
but I shied away from them as I set myself a goal to give users
individual handle on spam/virus filtering in email, and neither of them
has per-user spam preferences (take it with the grain of salt, I might
have missed something...)

Just my $0.02.







My belated addition. This is great overview of nextcloud vs ovncloud 
features (which makes evident the set of abilities of each):


https://civihosting.com/blog/nextcloud-vs-owncloud/

Valeri




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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Keith Keller]

On 2018-07-20, Nicolas Kovacs  wrote:
> Le 20/07/2018 à 07:44, Keith Keller a écrit :
>> A public SMTP server is not the easiest thing to configure, period. 
>> It is the quintessential rope on which many admins hang themselves.
>
> It's not rocket science either, but you have to be willing to read (a
> lot) and experiment (a lot).

You also need to be willing to stay on top of your outgoing mail to make
sure your network isn't sending spam, and you need to monitor the
various blacklists to make sure your SMTP servers are not ending up on
them.  It's not like (for example) an IMAP server, which once you have
working is mostly maintenance-free.

--keith

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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Nicolas Kovacs]

Le 20/07/2018 à 09:12, Promise Kumalo a écrit :
> Just out of curiosity, why are you not using something like Kolab or
> Zimbra?

Don't know. Never tried these, because I'm comfortable with Postfix,
Dovecot and Spamassassin. I might give these a spin though.

Thanks for the heads up.

Niki

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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Dave Stevens]

On Thu, 19 Jul 2018 09:57:22 -0500
Valeri Galtsev  wrote:

> 
> As far as google anything goes, not everybody volunteers one's 
> information into paws of google (and quite likely one or more of 3 
> letter agencies collecting information that way). I know (call it 
> educated guess) that about 70% of messages I send are ending up in 
> google databases whether I want it or not. Someone said quite some
> time ago: you don't need to recruit spies anymore, just roll out
> "free" services, and information will trickle to you. I am old enough
> to know what collection of information on everybody leads to (Hitler
> Germany, Stalin Russia, ...), but I also know that the worst lesson
> of history is: people do not learn lessons of history. So, I do the
> best I can do: roll out services people I work for may need, and
> avoid by any means advertising google whatever myself, I just keep
> neutral when that surfaces in discussions with my people.
> 

it's what Bertolt Brecht said, "Not everyone who shows you their teeth
is smiling."
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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[James B. Byrne via CentOS]

On Thu, July 19, 2018 10:57, Valeri Galtsev wrote:

> 
> . . . you don't need to recruit spies anymore, just roll out "free"
> services, and information will trickle to you. I am old enough to know
> what collection of information on everybody leads to (Hitler Germany,
> Stalin Russia, ...), but I also know that the worst lesson of history
> is: people do not learn lessons of history. . .
> 

History is the practice of justifying the present by rewriting the past.

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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Promise Kumalo]

Just out of curiosity, why are you not using something like Kolab or Zimbra?


On 07/20/2018 02:44 AM, Nicolas Kovacs wrote:
> Le 18/07/2018 à 17:04, Turritopsis Dohrnii Teo En Ming a écrit :
>> One of the features of Microsoft Exchange 2016 is that you can create
>> additional folders on your Inbox in the server (server-side). Can
>> Linux-based SMTP servers do that?
> I'm running a few bone-headed mail servers for schools and small
> companies. They're all bone-headed setups on CentOS. I'd say mail
> servers are not the easiest thing to configure under Linux. Anyway,
> here's all the ingredients I'm using.
>
>* https://blog.microlinux.fr/postfix-centos/
>
>* https://blog.microlinux.fr/dovecot-centos/
>
>* ttps://blog.microlinux.fr/postfix-dovecot-ssl-centos/
>
>* https://blog.microlinux.fr/spamassassin-centos/
>
>* https://blog.microlinux.fr/squirrelmail/
>
> Cheers,
>
> Niki
>

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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Nicolas Kovacs]

Le 20/07/2018 à 07:44, Keith Keller a écrit :
> A public SMTP server is not the easiest thing to configure, period. 
> It is the quintessential rope on which many admins hang themselves.

It's not rocket science either, but you have to be willing to read (a
lot) and experiment (a lot).

In France we have an expression for misconfigured public SMTP servers.

"Pompe à merde".

:o)

Niki

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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Keith Keller]

On 2018-07-19, Nicolas Kovacs  wrote:
> I'd say mail
> servers are not the easiest thing to configure under Linux.

A public SMTP server is not the easiest thing to configure, period.
It is the quintessential rope on which many admins hang themselves.


--keith
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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Valeri Galtsev]

On 07/19/18 17:51, Alice Wonder wrote:

On 07/19/2018 07:14 AM, Johnny Hughes wrote:

On 07/18/2018 04:05 PM, Valeri Galtsev wrote:



On 07/18/18 14:36, Johnny Hughes wrote:

On 07/18/2018 01:58 PM, Valeri Galtsev wrote:




But are you guys really telling you think the calendaring / 
scheduling

for individual users and the main corporate account, etc. .. are
working
well enough with any Linux solution.


I must confess, my servers are FreeBSD, but I'm quite sure the same is
doable easily on Linux.

We use for calendars Owncloud (may migrate to nextcloud in some future
to come). That authenticates against LDAP.


And does that calendar solution allow for things like:

1)  Allowing all users in the organization to see users calendars and
see when they are free to schedule a meeting with them.


Yes at least about a part of it: calendars can be shared with some
people or with everybody (which we didn't do, so I may be not 100%
presenting "experimental fact" here). Not certain about "free/not free"
mapped on calendars though.



2) Allow for designated people to schedule meetings for others (ie, 
your

secretary/office assistant can schedule meetings for people, etc.)


Yes, you can share calendar with anybody, and can set any set of choices

can read
can write
can "re-share" your calendar

You can share stuff to external people, and set individual
authentication for them independent of our system (in general, it is not
just calendars, but we use it for mostly synchronizing between all of
your devices, and also sharing: files, calendars, address book; it can
also be bookmarks, and there are variety of plugins expanding what else
can be accessed/synchronized via web/dav)



3) Allow a calendar to schedule shared items .. like meeting rooms,
shared vehicles, etc.  So that people can check those out for specifc
time windows, etc.


No, but for resource booking (if I read the question correctly) we use
mrbs (https://mrbs.sourceforge.io/). I know, that is not "integrated"
for you to have everything in one place. I never had time to look for
extention/plugin to suck from mrbs booked slot into one's calendar.



Those are just a couple of minor things a lot of solutions can't do

And do they work with imap, etc.


No, owncloud/nextcloud don't work with IMAP as far as I know. Mail
server is separate issue. Zimbra in that respect IS "integrated
collaborative environment". And so is Kolab. They both are lacking
per-user spam preferences. One more thing that added some minus for each
of them in my estimate what to choose is: behind each of them there is
commercial company. And that in my long experience significantly
increases the chance one day openly available incarnation of each may
become no longer available for us, and I will have to find replacement
in a rush and find the way to migrate to it, and the more sophisticated
the thing is, the trickier the migration will be.

My answers are mostly about owncloud which we use for quite some time.
Nextcloud is fork of owncloud, and to my regret nextcloud doesn't work
with postgresql, only with mysql/MariaDB, whereas owncloud works with
postgresql as well as with mysql/MariaDB (still we have some reasons to
migrate to nextcloud at some point).

I hope, someone with more knowledge will chime in.




Don't get me wrong.  I've run qmail, postfix, and zimbra mail servers
with IMAP, along with webmail front ends (roundcude, squirrel mail,
etc), for windows, mac and linux clients for several companies (all on
CentOS of course :D) .. I just don't think that calendaring that I have
seen is as user friendly as google calendar (for example).  But I'm all
for people running mail servers on CentOS (or any other Linux) if they
want !


I can't use google calendar because it used tracking cookies which I block.

So it doesn't work for me.

Would actually love to see a distributed / federated calendaring 
platform developed, that I suspect would do well.


Owncloud and nextcloud support federation.

Valeri



What I mean is Company A can choose to federate with Company B when 
needed to allow cross-scheduling when needed while both still maintain 
complete ownership of their calendar data.


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Valeri Galtsev
Sr System Administrator
Department of Astronomy and Astrophysics
Kavli Institute for Cosmological Physics
University of Chicago
Phone: 773-702-4247

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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Alice Wonder]

On 07/19/2018 07:14 AM, Johnny Hughes wrote:

On 07/18/2018 04:05 PM, Valeri Galtsev wrote:



On 07/18/18 14:36, Johnny Hughes wrote:

On 07/18/2018 01:58 PM, Valeri Galtsev wrote:





But are you guys really telling you think the calendaring / scheduling
for individual users and the main corporate account, etc. .. are
working
well enough with any Linux solution.


I must confess, my servers are FreeBSD, but I'm quite sure the same is
doable easily on Linux.

We use for calendars Owncloud (may migrate to nextcloud in some future
to come). That authenticates against LDAP.


And does that calendar solution allow for things like:

1)  Allowing all users in the organization to see users calendars and
see when they are free to schedule a meeting with them.


Yes at least about a part of it: calendars can be shared with some
people or with everybody (which we didn't do, so I may be not 100%
presenting "experimental fact" here). Not certain about "free/not free"
mapped on calendars though.



2) Allow for designated people to schedule meetings for others (ie, your
secretary/office assistant can schedule meetings for people, etc.)


Yes, you can share calendar with anybody, and can set any set of choices

can read
can write
can "re-share" your calendar

You can share stuff to external people, and set individual
authentication for them independent of our system (in general, it is not
just calendars, but we use it for mostly synchronizing between all of
your devices, and also sharing: files, calendars, address book; it can
also be bookmarks, and there are variety of plugins expanding what else
can be accessed/synchronized via web/dav)



3) Allow a calendar to schedule shared items .. like meeting rooms,
shared vehicles, etc.  So that people can check those out for specifc
time windows, etc.


No, but for resource booking (if I read the question correctly) we use
mrbs (https://mrbs.sourceforge.io/). I know, that is not "integrated"
for you to have everything in one place. I never had time to look for
extention/plugin to suck from mrbs booked slot into one's calendar.



Those are just a couple of minor things a lot of solutions can't do

And do they work with imap, etc.


No, owncloud/nextcloud don't work with IMAP as far as I know. Mail
server is separate issue. Zimbra in that respect IS "integrated
collaborative environment". And so is Kolab. They both are lacking
per-user spam preferences. One more thing that added some minus for each
of them in my estimate what to choose is: behind each of them there is
commercial company. And that in my long experience significantly
increases the chance one day openly available incarnation of each may
become no longer available for us, and I will have to find replacement
in a rush and find the way to migrate to it, and the more sophisticated
the thing is, the trickier the migration will be.

My answers are mostly about owncloud which we use for quite some time.
Nextcloud is fork of owncloud, and to my regret nextcloud doesn't work
with postgresql, only with mysql/MariaDB, whereas owncloud works with
postgresql as well as with mysql/MariaDB (still we have some reasons to
migrate to nextcloud at some point).

I hope, someone with more knowledge will chime in.




Don't get me wrong.  I've run qmail, postfix, and zimbra mail servers
with IMAP, along with webmail front ends (roundcude, squirrel mail,
etc), for windows, mac and linux clients for several companies (all on
CentOS of course :D) .. I just don't think that calendaring that I have
seen is as user friendly as google calendar (for example).  But I'm all
for people running mail servers on CentOS (or any other Linux) if they
want !


I can't use google calendar because it used tracking cookies which I block.

So it doesn't work for me.

Would actually love to see a distributed / federated calendaring 
platform developed, that I suspect would do well.


What I mean is Company A can choose to federate with Company B when 
needed to allow cross-scheduling when needed while both still maintain 
complete ownership of their calendar data.


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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Nicolas Kovacs]

Le 18/07/2018 à 17:04, Turritopsis Dohrnii Teo En Ming a écrit :
> One of the features of Microsoft Exchange 2016 is that you can create
> additional folders on your Inbox in the server (server-side). Can
> Linux-based SMTP servers do that?

I'm running a few bone-headed mail servers for schools and small
companies. They're all bone-headed setups on CentOS. I'd say mail
servers are not the easiest thing to configure under Linux. Anyway,
here's all the ingredients I'm using.

  * https://blog.microlinux.fr/postfix-centos/

  * https://blog.microlinux.fr/dovecot-centos/

  * ttps://blog.microlinux.fr/postfix-dovecot-ssl-centos/

  * https://blog.microlinux.fr/spamassassin-centos/

  * https://blog.microlinux.fr/squirrelmail/

Cheers,

Niki

-- 
Microlinux - Solutions informatiques durables
7, place de l'église - 30730 Montpezat
Site : https://www.microlinux.fr
Blog : https://blog.microlinux.fr
Mail : i...@microlinux.fr
Tél. : 04 66 63 10 32
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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[David C. Miller]

- Original Message -
> From: "Keith Keller" 
> To: centos@centos.org
> Sent: Thursday, July 19, 2018 11:33:17 AM
> Subject: Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based 
> SMTP Servers?

> On 2018-07-19, Mark Rousell  wrote:
>>
>> Well said. I feel that too many people today have forgotten (or, more
>> likely, never learned) these lessons from history. People give away
>> their personal and supposedly private information too easily and, I feel
>> certain, will come to regret it (some already have come to regret it).
> 
> While I agree with the above, it doesn't really address Johnny's
> question, which is which open source calendaring projects can compete
> with Google calendar for users' ease of use?  If I give my users Zimbra,
> and they hate it, then what?  For simple email use, there are plenty of
> clients which can talk IMAP/SMTP to a linux server, but the options for
> calendaring (and ''groupware'' in general) are much sparser.
> 
> It's a hard question, and each organization needs to weigh their privacy
> concerns against their users' requirements.
> 
> --keith
> 
> --
> kkel...@wombat.san-francisco.ca.us

Zimbra's calendaring component is also a CALDav compliant server. Users can 
also share their calendars either via the zimbra web client(public, or 
restricted to an email address with a password), or exporting the calendar to 
an ICS file. CALDav compliant calendar clients like Apples calendar app on Mac 
and iOS can subscribe or connect to the zimbra server using its 
https://zimbra.example.com address. The Zimbra web client interface for using 
and managing calendars is just as easy to use as googles calendars. 

David.
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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Leo R. Lundgren]

19 jul 2018 kl. 20:33 skrev Keith Keller :

> On 2018-07-19, Mark Rousell  wrote:
>> 
>> Well said. I feel that too many people today have forgotten (or, more
>> likely, never learned) these lessons from history. People give away
>> their personal and supposedly private information too easily and, I feel
>> certain, will come to regret it (some already have come to regret it).
> 
> While I agree with the above, it doesn't really address Johnny's
> question, which is which open source calendaring projects can compete
> with Google calendar for users' ease of use?  If I give my users Zimbra,
> and they hate it, then what?  For simple email use, there are plenty of
> clients which can talk IMAP/SMTP to a linux server, but the options for
> calendaring (and ''groupware'' in general) are much sparser.
> 
> It's a hard question, and each organization needs to weigh their privacy
> concerns against their users' requirements.
> 
> --keith

Just to chime in, I'm using Fruux.com for a client, and while it's not per se 
an open source service, it works really really well and uses open source 
protocols for its operation (CalDAV and CardDAV). They also have great central 
administration, even if it's all local accounts. They use SabreDAV as the 
foundation for the service, hence I think it's worth mentioning.

Regards, Leo
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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Keith Keller]

On 2018-07-19, Mark Rousell  wrote:
>
> Well said. I feel that too many people today have forgotten (or, more
> likely, never learned) these lessons from history. People give away
> their personal and supposedly private information too easily and, I feel
> certain, will come to regret it (some already have come to regret it).

While I agree with the above, it doesn't really address Johnny's
question, which is which open source calendaring projects can compete
with Google calendar for users' ease of use?  If I give my users Zimbra,
and they hate it, then what?  For simple email use, there are plenty of
clients which can talk IMAP/SMTP to a linux server, but the options for
calendaring (and ''groupware'' in general) are much sparser.

It's a hard question, and each organization needs to weigh their privacy
concerns against their users' requirements.

--keith

-- 
kkel...@wombat.san-francisco.ca.us


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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Johnny Hughes]

On 07/19/2018 09:57 AM, Valeri Galtsev wrote:
> 

> 
> As far as google anything goes, not everybody volunteers one's
> information into paws of google (and quite likely one or more of 3
> letter agencies collecting information that way). I know (call it
> educated guess) that about 70% of messages I send are ending up in
> google databases whether I want it or not. Someone said quite some time
> ago: you don't need to recruit spies anymore, just roll out "free"
> services, and information will trickle to you. I am old enough to know
> what collection of information on everybody leads to (Hitler Germany,
> Stalin Russia, ...), but I also know that the worst lesson of history
> is: people do not learn lessons of history. So, I do the best I can do:
> roll out services people I work for may need, and avoid by any means
> advertising google whatever myself, I just keep neutral when that
> surfaces in discussions with my people.
> 

Your points are valid for sure .. but if you are not encrypting your
email, then all of it is likely being scanned and saved anyway.  Any
router along the way can log packets and see whatever is transmitted
that is not encrypted.

Most of the world uses android phones (I think it is like 75% now) and
all the mail that goes there is available to google as well, right?

Not to say I like it .. I don't.  But people want it to work, work in a
user friendly way and convenient access from everywhere .. and from
their phone, their home pc, while traveling, etc.






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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[mark]

Valeri Galtsev wrote:


> 
> As far as google anything goes, not everybody volunteers one's
> information into paws of google (and quite likely one or more of 3 letter
> agencies collecting information that way). I know (call it educated guess)
> that about 70% of messages I send are ending up in google databases
> whether I want it or not. Someone said quite some time ago: you don't need
> to recruit spies anymore, just roll out "free" services, and information
> will trickle to you. I am old enough to know what collection of
> information on everybody leads to (Hitler Germany, Stalin Russia, ...),
> but I also know that the worst lesson of history is: people do not learn
> lessons of history. So, I do the best I can do: roll out services people I
> work for may need, and avoid by any means advertising google whatever
> myself, I just keep neutral when that surfaces in discussions with my
> people. 
>
Yep. That's why I refuse to have a google account, and why I recommended
against it for business use. I have no knowledge, but even if you pay
google for a "private" business account, I have next to no trust that they
do not have something scanning for info to sell, or market to - we all
*know* they do that to all free email accounts.

"First, do no harm"? Long gone, eaten by their marketing dept, which is
why the signal-to-noise ratio has gone *way* down in the laft five years.

I'll stop the rant now, too, it's OT for the list.

 mark

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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Mark Rousell]

On 19/07/2018 15:57, Valeri Galtsev wrote:
> 
> As far as google anything goes, not everybody volunteers one's
> information into paws of google (and quite likely one or more of 3
> letter agencies collecting information that way). I know (call it
> educated guess) that about 70% of messages I send are ending up in
> google databases whether I want it or not. Someone said quite some
> time ago: you don't need to recruit spies anymore, just roll out
> "free" services, and information will trickle to you. I am old enough
> to know what collection of information on everybody leads to (Hitler
> Germany, Stalin Russia, ...), but I also know that the worst lesson of
> history is: people do not learn lessons of history. So, I do the best
> I can do: roll out services people I work for may need, and avoid by
> any means advertising google whatever myself, I just keep neutral when
> that surfaces in discussions with my people.
> 

Well said. I feel that too many people today have forgotten (or, more
likely, never learned) these lessons from history. People give away
their personal and supposedly private information too easily and, I feel
certain, will come to regret it (some already have come to regret it).


-- 
Mark Rousell
 
 
 

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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Valeri Galtsev]

On 07/19/18 09:14, Johnny Hughes wrote:

On 07/18/2018 04:05 PM, Valeri Galtsev wrote:



On 07/18/18 14:36, Johnny Hughes wrote:

On 07/18/2018 01:58 PM, Valeri Galtsev wrote:





But are you guys really telling you think the calendaring / scheduling
for individual users and the main corporate account, etc. .. are
working
well enough with any Linux solution.


I must confess, my servers are FreeBSD, but I'm quite sure the same is
doable easily on Linux.

We use for calendars Owncloud (may migrate to nextcloud in some future
to come). That authenticates against LDAP.


And does that calendar solution allow for things like:

1)  Allowing all users in the organization to see users calendars and
see when they are free to schedule a meeting with them.


Yes at least about a part of it: calendars can be shared with some
people or with everybody (which we didn't do, so I may be not 100%
presenting "experimental fact" here). Not certain about "free/not free"
mapped on calendars though.



2) Allow for designated people to schedule meetings for others (ie, your
secretary/office assistant can schedule meetings for people, etc.)


Yes, you can share calendar with anybody, and can set any set of choices

can read
can write
can "re-share" your calendar

You can share stuff to external people, and set individual
authentication for them independent of our system (in general, it is not
just calendars, but we use it for mostly synchronizing between all of
your devices, and also sharing: files, calendars, address book; it can
also be bookmarks, and there are variety of plugins expanding what else
can be accessed/synchronized via web/dav)



3) Allow a calendar to schedule shared items .. like meeting rooms,
shared vehicles, etc.  So that people can check those out for specifc
time windows, etc.


No, but for resource booking (if I read the question correctly) we use
mrbs (https://mrbs.sourceforge.io/). I know, that is not "integrated"
for you to have everything in one place. I never had time to look for
extention/plugin to suck from mrbs booked slot into one's calendar.



Those are just a couple of minor things a lot of solutions can't do

And do they work with imap, etc.


No, owncloud/nextcloud don't work with IMAP as far as I know. Mail
server is separate issue. Zimbra in that respect IS "integrated
collaborative environment". And so is Kolab. They both are lacking
per-user spam preferences. One more thing that added some minus for each
of them in my estimate what to choose is: behind each of them there is
commercial company. And that in my long experience significantly
increases the chance one day openly available incarnation of each may
become no longer available for us, and I will have to find replacement
in a rush and find the way to migrate to it, and the more sophisticated
the thing is, the trickier the migration will be.

My answers are mostly about owncloud which we use for quite some time.
Nextcloud is fork of owncloud, and to my regret nextcloud doesn't work
with postgresql, only with mysql/MariaDB, whereas owncloud works with
postgresql as well as with mysql/MariaDB (still we have some reasons to
migrate to nextcloud at some point).

I hope, someone with more knowledge will chime in.




Don't get me wrong.  I've run qmail, postfix, and zimbra mail servers
with IMAP, along with webmail front ends (roundcude, squirrel mail,
etc), for windows, mac and linux clients for several companies (all on
CentOS of course :D) .. I just don't think that calendaring that I have
seen is as user friendly as google calendar (for example).  But I'm all
for people running mail servers on CentOS (or any other Linux) if they
want !


No, I'm not getting you wrong. You gave nicely put set of properties 
[some]one may be interested to know of, which I tried to answer. Also: 
Thanks, Arif, for correcting/expanding in the other post what I said 
about owncloud/nextcloud. That was extremely helpful!



As far as google anything goes, not everybody volunteers one's 
information into paws of google (and quite likely one or more of 3 
letter agencies collecting information that way). I know (call it 
educated guess) that about 70% of messages I send are ending up in 
google databases whether I want it or not. Someone said quite some time 
ago: you don't need to recruit spies anymore, just roll out "free" 
services, and information will trickle to you. I am old enough to know 
what collection of information on everybody leads to (Hitler Germany, 
Stalin Russia, ...), but I also know that the worst lesson of history 
is: people do not learn lessons of history. So, I do the best I can do: 
roll out services people I work for may need, and avoid by any means 
advertising google whatever myself, I just keep neutral when that 
surfaces in discussions with my people.




Valeri






Zimbra does not work very well with
Thunderbird and Lighting (for example) .. many solutions don't work with
Windows or Mac clients, etc.




For mail we 

Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Johnny Hughes]

On 07/18/2018 04:05 PM, Valeri Galtsev wrote:
> 
> 
> On 07/18/18 14:36, Johnny Hughes wrote:
>> On 07/18/2018 01:58 PM, Valeri Galtsev wrote:
>>
>>
>> 
>>
 But are you guys really telling you think the calendaring / scheduling
 for individual users and the main corporate account, etc. .. are
 working
 well enough with any Linux solution.
>>>
>>> I must confess, my servers are FreeBSD, but I'm quite sure the same is
>>> doable easily on Linux.
>>>
>>> We use for calendars Owncloud (may migrate to nextcloud in some future
>>> to come). That authenticates against LDAP.
>>
>> And does that calendar solution allow for things like:
>>
>> 1)  Allowing all users in the organization to see users calendars and
>> see when they are free to schedule a meeting with them.
> 
> Yes at least about a part of it: calendars can be shared with some
> people or with everybody (which we didn't do, so I may be not 100%
> presenting "experimental fact" here). Not certain about "free/not free"
> mapped on calendars though.
> 
>>
>> 2) Allow for designated people to schedule meetings for others (ie, your
>> secretary/office assistant can schedule meetings for people, etc.)
> 
> Yes, you can share calendar with anybody, and can set any set of choices
> 
> can read
> can write
> can "re-share" your calendar
> 
> You can share stuff to external people, and set individual
> authentication for them independent of our system (in general, it is not
> just calendars, but we use it for mostly synchronizing between all of
> your devices, and also sharing: files, calendars, address book; it can
> also be bookmarks, and there are variety of plugins expanding what else
> can be accessed/synchronized via web/dav)
> 
>>
>> 3) Allow a calendar to schedule shared items .. like meeting rooms,
>> shared vehicles, etc.  So that people can check those out for specifc
>> time windows, etc.
> 
> No, but for resource booking (if I read the question correctly) we use
> mrbs (https://mrbs.sourceforge.io/). I know, that is not "integrated"
> for you to have everything in one place. I never had time to look for
> extention/plugin to suck from mrbs booked slot into one's calendar.
> 
>>
>> Those are just a couple of minor things a lot of solutions can't do
>>
>> And do they work with imap, etc. 
> 
> No, owncloud/nextcloud don't work with IMAP as far as I know. Mail
> server is separate issue. Zimbra in that respect IS "integrated
> collaborative environment". And so is Kolab. They both are lacking
> per-user spam preferences. One more thing that added some minus for each
> of them in my estimate what to choose is: behind each of them there is
> commercial company. And that in my long experience significantly
> increases the chance one day openly available incarnation of each may
> become no longer available for us, and I will have to find replacement
> in a rush and find the way to migrate to it, and the more sophisticated
> the thing is, the trickier the migration will be.
> 
> My answers are mostly about owncloud which we use for quite some time.
> Nextcloud is fork of owncloud, and to my regret nextcloud doesn't work
> with postgresql, only with mysql/MariaDB, whereas owncloud works with
> postgresql as well as with mysql/MariaDB (still we have some reasons to
> migrate to nextcloud at some point).
> 
> I hope, someone with more knowledge will chime in.
> 
> 

Don't get me wrong.  I've run qmail, postfix, and zimbra mail servers
with IMAP, along with webmail front ends (roundcude, squirrel mail,
etc), for windows, mac and linux clients for several companies (all on
CentOS of course :D) .. I just don't think that calendaring that I have
seen is as user friendly as google calendar (for example).  But I'm all
for people running mail servers on CentOS (or any other Linux) if they
want !

> 
>> Zimbra does not work very well with
>> Thunderbird and Lighting (for example) .. many solutions don't work with
>> Windows or Mac clients, etc.
>>
>>
>>>
>>> For mail we use postfix, dovecot and maia for spam filtering (the last
>>> harnesses spamassassin, clamav and few other things).
>>>
>>> Of course, zimbra you mentioned earlier in the thread (or was it not
>>> you?), and Kolab provide more corporate-like collaboration environments,
>>> but I shied away from them as I set myself a goal to give users
>>> individual handle on spam/virus filtering in email, and neither of them
>>> has per-user spam preferences (take it with the grain of salt, I might
>>> have missed something...)
>>>
>>> Just my $0.02.
>>>
>> 



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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[S P Arif Sahari Wibowo via CentOS]

On 2018-07-18, 15:05, Valeri Galtsev wrote:
No, owncloud/nextcloud don't work with IMAP as far as I know. 
Mail server is separate issue.


Depend on what you define as "work with IMAP", Nextcloud does 
not come with IMAP server, but installing an IMAP server on the 
side of Nextcloud/Owncloud using the same storage probably not 
that difficult. Furthermore, Nextcloud can have IMAP as 
authentication backend, and also have extension that allow 
accessing IMAP from inside Nextcloud interface, make it easier 
to give impression of integration to users.


significantly increases the chance one day openly available 
incarnation of each may become no longer available for us, and 
I will have to find replacement in a rush and find the way to 
migrate to it, and the more sophisticated the thing is, the 
trickier the migration will be.


That said, if the code actually FOSS, then anybody who is 
willing can fork the last FOSS code and continue developing it, 
and we have many of those, like Illumos out of Open Solaris, 
LibreOffice out of OpenOffice, MariaDB out of MySQL, Bareos out 
of Bacula, etc.


Nextcloud is fork of owncloud, and to my regret nextcloud 
doesn't work with postgresql,


Not true, Nextcloud can have PostgreSQL as database backend: 
https://docs.nextcloud.com/server/12/admin_manual/configuration_database/linux_database_configuration.html


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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Keith Keller]

On 2018-07-18, Turritopsis Dohrnii Teo En Ming 
 wrote:
>
> I am torn between deploying Microsoft Exchange 2016 and Linux-based
> SMTP servers like sendmail, postfix, qmail and exim.

Why are you multiposting this question to multiple mailing lists?

--keith

-- 
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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[David C. Miller]

I'm going to recommend going with a hosted solution if possible like google or 
office365. Assuming you have to host it I recommend Zimbra for a good Linux 
solution that is very much like exchange. Zimbra collaboration suite server can 
even act like an exchange server to android/ios devices and outlook for the 
paid for version. It is about as easy to setup/configure and maintain as 
exchange is. Note: I have maintained a 600 user Zimbra server for almost 10 
years now. I have maintained postfix, sendmail, devcot, spam assassin, etc in 
the past too so I kinda.. kinda know a little bit about this stuff. Rolling 
your own now days is not worth it in most cases.

David Miller.

- Original Message -
> From: "Turritopsis Dohrnii Teo En Ming" 
> To: centos@centos.org
> Sent: Wednesday, July 18, 2018 8:04:52 AM
> Subject: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based 
> SMTP Servers?

> Good evening from Singapore,
> 
> I am torn between deploying Microsoft Exchange 2016 and Linux-based
> SMTP servers like sendmail, postfix, qmail and exim.
> 
> Relative ease of installation and configuration is an important
> consideration factor.
> 
> Microsoft Exchange 2016, Domain Controller, and Active Directory are
> relatively easy to install and configure. Linux-based SMTP servers are
> extremely difficult to install and configure and of course, extremely
> time-consuming.
> 
> One of the features of Microsoft Exchange 2016 is that you can create
> additional folders on your Inbox in the server (server-side). Can
> Linux-based SMTP servers do that?
> 
> Does Exchange 2016 offer more user-friendly features or Linux-based
> SMTP servers?
> 
> Besides the above considerations, how about security? Traditionally,
> Linux is far more secure than Windows.
> 
> Judging by security, Linux-based SMTP servers ought to have a higher 
> percentage
> of the market share?
> 
> Finally, I can only use Windows Server 2016 Standard Evaluation Copy FREE for 
> a
> period of 3 years MAXIMUM. But I can use Linux servers and Mail Transport
> Agents (MTA) FREE perpetually.
> 
> Please advise.
> 
> Thank you very much.
> 
> 
> 
> ===BEGIN SIGNATURE===
> 
> Turritopsis Dohrnii Teo En Ming's Academic Qualifications as at 30 Oct 2017
> 
> [1] https://tdtemcerts.wordpress.com/
> 
> <https://tdtemcerts.wordpress.com/> [2] http://tdtemcerts.blogspot.sg/
> 
> <http://tdtemcerts.blogspot.sg/> [3]
> https://www.scribd.com/user/270125049/Teo-En-Ming
> 
> <https://www.scribd.com/user/270125049/Teo-En-Ming> ===END SIGNATURE===
> 
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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Valeri Galtsev]

On 07/18/18 14:36, Johnny Hughes wrote:

On 07/18/2018 01:58 PM, Valeri Galtsev wrote:





But are you guys really telling you think the calendaring / scheduling
for individual users and the main corporate account, etc. .. are working
well enough with any Linux solution.


I must confess, my servers are FreeBSD, but I'm quite sure the same is
doable easily on Linux.

We use for calendars Owncloud (may migrate to nextcloud in some future
to come). That authenticates against LDAP.


And does that calendar solution allow for things like:

1)  Allowing all users in the organization to see users calendars and
see when they are free to schedule a meeting with them.


Yes at least about a part of it: calendars can be shared with some 
people or with everybody (which we didn't do, so I may be not 100% 
presenting "experimental fact" here). Not certain about "free/not free" 
mapped on calendars though.




2) Allow for designated people to schedule meetings for others (ie, your
secretary/office assistant can schedule meetings for people, etc.)


Yes, you can share calendar with anybody, and can set any set of choices

can read
can write
can "re-share" your calendar

You can share stuff to external people, and set individual 
authentication for them independent of our system (in general, it is not 
just calendars, but we use it for mostly synchronizing between all of 
your devices, and also sharing: files, calendars, address book; it can 
also be bookmarks, and there are variety of plugins expanding what else 
can be accessed/synchronized via web/dav)




3) Allow a calendar to schedule shared items .. like meeting rooms,
shared vehicles, etc.  So that people can check those out for specifc
time windows, etc.


No, but for resource booking (if I read the question correctly) we use 
mrbs (https://mrbs.sourceforge.io/). I know, that is not "integrated" 
for you to have everything in one place. I never had time to look for 
extention/plugin to suck from mrbs booked slot into one's calendar.




Those are just a couple of minor things a lot of solutions can't do

And do they work with imap, etc. 


No, owncloud/nextcloud don't work with IMAP as far as I know. Mail 
server is separate issue. Zimbra in that respect IS "integrated 
collaborative environment". And so is Kolab. They both are lacking 
per-user spam preferences. One more thing that added some minus for each 
of them in my estimate what to choose is: behind each of them there is 
commercial company. And that in my long experience significantly 
increases the chance one day openly available incarnation of each may 
become no longer available for us, and I will have to find replacement 
in a rush and find the way to migrate to it, and the more sophisticated 
the thing is, the trickier the migration will be.


My answers are mostly about owncloud which we use for quite some time. 
Nextcloud is fork of owncloud, and to my regret nextcloud doesn't work 
with postgresql, only with mysql/MariaDB, whereas owncloud works with 
postgresql as well as with mysql/MariaDB (still we have some reasons to 
migrate to nextcloud at some point).


I hope, someone with more knowledge will chime in.


Valeri


Zimbra does not work very well with
Thunderbird and Lighting (for example) .. many solutions don't work with
Windows or Mac clients, etc.




For mail we use postfix, dovecot and maia for spam filtering (the last
harnesses spamassassin, clamav and few other things).

Of course, zimbra you mentioned earlier in the thread (or was it not
you?), and Kolab provide more corporate-like collaboration environments,
but I shied away from them as I set myself a goal to give users
individual handle on spam/virus filtering in email, and neither of them
has per-user spam preferences (take it with the grain of salt, I might
have missed something...)

Just my $0.02.






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University of Chicago
Phone: 773-702-4247

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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Leon Fauster via CentOS]

Am 18.07.2018 um 20:27 schrieb Johnny Hughes :
> 
> So, I don't think anyone can call me a 'non linux' guy :)
> 
> But are you guys really telling you think the calendaring / scheduling
> for individual users and the main corporate account, etc. .. are working
> well enough with any Linux solution.
> 
> I have researched this very recently and I have not found a solution
> that works even reasonably well.

did you checked this

http://sabre.io/baikal/

http://sabre.io/

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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Bernard Lheureux]

On 18/07/2018 17:04, Turritopsis Dohrnii Teo En Ming wrote:

Zarafa is also a very good Linux Exchange Like !!!

Good evening from Singapore,

I am torn between deploying Microsoft Exchange 2016 and Linux-based
SMTP servers like sendmail, postfix, qmail and exim.

Relative ease of installation and configuration is an important
consideration factor.

Microsoft Exchange 2016, Domain Controller, and Active Directory are
relatively easy to install and configure. Linux-based SMTP servers are
extremely difficult to install and configure and of course, extremely
time-consuming.

One of the features of Microsoft Exchange 2016 is that you can create
additional folders on your Inbox in the server (server-side). Can
Linux-based SMTP servers do that?

Does Exchange 2016 offer more user-friendly features or Linux-based
SMTP servers?

Besides the above considerations, how about security? Traditionally,
Linux is far more secure than Windows.

Judging by security, Linux-based SMTP servers ought to have a higher percentage 
of the market share?

Finally, I can only use Windows Server 2016 Standard Evaluation Copy FREE for a 
period of 3 years MAXIMUM. But I can use Linux servers and Mail Transport 
Agents (MTA) FREE perpetually.


--
(°- Bernard Lheureux
//\ Linux System Administrator
v_/_MailTo:bern...@lheureux.be

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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Johnny Hughes]

On 07/18/2018 01:58 PM, Valeri Galtsev wrote:




>> But are you guys really telling you think the calendaring / scheduling
>> for individual users and the main corporate account, etc. .. are working
>> well enough with any Linux solution.
> 
> I must confess, my servers are FreeBSD, but I'm quite sure the same is
> doable easily on Linux.
> 
> We use for calendars Owncloud (may migrate to nextcloud in some future
> to come). That authenticates against LDAP.

And does that calendar solution allow for things like:

1)  Allowing all users in the organization to see users calendars and
see when they are free to schedule a meeting with them.

2) Allow for designated people to schedule meetings for others (ie, your
secretary/office assistant can schedule meetings for people, etc.)

3) Allow a calendar to schedule shared items .. like meeting rooms,
shared vehicles, etc.  So that people can check those out for specifc
time windows, etc.

Those are just a couple of minor things a lot of solutions can't do

And do they work with imap, etc.  Zimbra does not work very well with
Thunderbird and Lighting (for example) .. many solutions don't work with
Windows or Mac clients, etc.


> 
> For mail we use postfix, dovecot and maia for spam filtering (the last
> harnesses spamassassin, clamav and few other things).
> 
> Of course, zimbra you mentioned earlier in the thread (or was it not
> you?), and Kolab provide more corporate-like collaboration environments,
> but I shied away from them as I set myself a goal to give users
> individual handle on spam/virus filtering in email, and neither of them
> has per-user spam preferences (take it with the grain of salt, I might
> have missed something...)
> 
> Just my $0.02.
> 




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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Michael Schumacher]

> Good evening from Singapore,

> I am torn between deploying Microsoft Exchange 2016 and Linux-based
> SMTP servers like sendmail, postfix, qmail and exim.

> Relative ease of installation and configuration is an important
> consideration factor.

I think we didn't hear about some important points:

How many people in your IT-department?
How large is your organization?
What do your users need and want?
Where is your experience?


The reason I am asking the third question is that exchange is
certainly not only a mail system. It offers a lot of other
functionality like calendar and I don't know what.
For me, it was an easy decision. More than 20 years ago my
organization wanted to implement a mail system. Microsoft was a t that
time still in stone age and it may be that they didn't even have a
server based solution available at that time.
Bottom line, if you are heading for a mail server system, go for
Postfix, dovecot, etc.
Btw., we NEVER lost a single mail. I still have mails from 1998 :-)

Both paths may be suitable, but with Linux, you are pretty safe of nasty
things that do not do as you want. I know that this MS-bugs bother me
a lot at my users workstations, so why should it be different at the
server side.

Michael

Michael

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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Andreas Haumer]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Hi!

Am 18.07.2018 um 20:27 schrieb Johnny Hughes:
[...]
> 
> But are you guys really telling you think the calendaring / scheduling for 
> individual users and the main corporate account, etc. .. are working well 
> enough with any Linux solution.
> 
[...]

Yes, I do think so!  :-)

At least for up to about 100 users (that's the size of the businesses
we usually have as our customers)

We implemented Linux-based groupware solutions for those clients in the past
(and hopefully will do in the future) based on the following main components:

*) Linux (CentOS, SLES, OpenSUSE, depending on customers preferences)

*) Cyrus IMAP

*) Sendmail [sic]

*) OpenLDAP

*) SOGO (nobody mentioned SOGO yet, but IMHO it works very well and integrates 
perfectly into the Linux software stack!)

*) Fusiondirectory (was GOSa)

*) And the usuall suspects like ClamAV, SpamAssassin, ...


This solution provides:

*) Basic Mail (Relay, Server, Storage, ...)

*) Webmail (through SOGO)

*) Calendar and address book Web UI

*) Calendar and address book for a desktop client like Thunderbird (CalDAV, 
CardDAV)

*) Web-Based Admin UI for both admins and users (to manage their own accounts)

*) Integration with smartphones (mail, calendar, address book)

*) Features like shared mailboxes, shared calendars, ...

*) Easy integration with all typical Unix/Linux services (Fileserver, 
Webserver, VPN, ...)


I have no experience with Exchange (and I refuse to get any),
but I have "some" with Unix/Linux (since 1990. Yes I'm old ;-)

For me the above mentined software stack "just works" and it
does for the more advanced business use case, too.

I can't say anything about solutions for thousands of users, though, so YMMV!

Regards

- - andreas

- -- 
Andreas Haumer | mailto:andr...@xss.co.at
*x Software + Systeme  | http://www.xss.co.at/
Karmarschgasse 51/2/20 | Tel: +43-1-6060114-0
A-1100 Vienna, Austria | Fax: +43-1-6060114-71
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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[mark]

Andrew Holway wrote:
>> Andrew, you should understand that you are talking to experts in Linux
>> here.
>>
>
> No, i was talking to the OP who is seemingly not an expert. Advising
> those who not competent that they can set up and run their own mailserver
> is probably negligent.
>
> Whipping up Exim and Dovecot for your own private email server is one
> thing. Setting up for an organisation is a completely different story.
> Mailservers are extremely hard to do well and a job for a specialists.
> Just making mail deliverable requires specialist knowledge and keeping
> an up-to-date and effective spam filter is near impossible nowadays.

Excerpt, what you seem to be missing, is that the OP posted *here*, and it
seems, at least to me, that he's looking at Linux as a distinct
possibility.

 mark

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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Valeri Galtsev]

On 07/18/18 13:27, Johnny Hughes wrote:

On 07/18/2018 12:33 PM, Valeri Galtsev wrote:



On 07/18/18 12:24, Andrew Holway wrote:



Still a lot better than trying to run your own hodge-podge of
nightmares
on Linux.


Beg pardon? Did I make a mistake on the email address? I thought this
went
to the CentOS general discussion list.



I specifically meant setting up and running email services on linux is
not
for the feint of heart and delivers little real value considering the
plethora of free and commercial email services available.


Andrew, you should understand that you are talking to experts in Linux
here. And even I (and I'm not considering myself an expert in Linux)
have no trouble to set up mail server on Linux (with all blows and
whistles like spam/virus filtering, etc).

So, Mark meant to say your posts are offensive to Experts on this list.

Please, take a note of it.



So, I don't think anyone can call me a 'non linux' guy :)

But are you guys really telling you think the calendaring / scheduling
for individual users and the main corporate account, etc. .. are working
well enough with any Linux solution.


I must confess, my servers are FreeBSD, but I'm quite sure the same is 
doable easily on Linux.


We use for calendars Owncloud (may migrate to nextcloud in some future 
to come). That authenticates against LDAP.


For mail we use postfix, dovecot and maia for spam filtering (the last 
harnesses spamassassin, clamav and few other things).


Of course, zimbra you mentioned earlier in the thread (or was it not 
you?), and Kolab provide more corporate-like collaboration environments, 
but I shied away from them as I set myself a goal to give users 
individual handle on spam/virus filtering in email, and neither of them 
has per-user spam preferences (take it with the grain of salt, I might 
have missed something...)


Just my $0.02.

Valeri



I have researched this very recently and I have not found a solution
that works even reasonably well.

Red Hat has even shifted their calendars to Google .. does anyone think
if an enterprise calendar that really worked was out there they would
not be using it?



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Sr System Administrator
Department of Astronomy and Astrophysics
Kavli Institute for Cosmological Physics
University of Chicago
Phone: 773-702-4247

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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Johnny Hughes]

On 07/18/2018 12:33 PM, Valeri Galtsev wrote:
> 
> 
> On 07/18/18 12:24, Andrew Holway wrote:
>>>
 Still a lot better than trying to run your own hodge-podge of
 nightmares
 on Linux.
>>>
>>> Beg pardon? Did I make a mistake on the email address? I thought this
>>> went
>>> to the CentOS general discussion list.
>>>
>>
>> I specifically meant setting up and running email services on linux is
>> not
>> for the feint of heart and delivers little real value considering the
>> plethora of free and commercial email services available.
> 
> Andrew, you should understand that you are talking to experts in Linux
> here. And even I (and I'm not considering myself an expert in Linux)
> have no trouble to set up mail server on Linux (with all blows and
> whistles like spam/virus filtering, etc).
> 
> So, Mark meant to say your posts are offensive to Experts on this list.
> 
> Please, take a note of it.
> 

So, I don't think anyone can call me a 'non linux' guy :)

But are you guys really telling you think the calendaring / scheduling
for individual users and the main corporate account, etc. .. are working
well enough with any Linux solution.

I have researched this very recently and I have not found a solution
that works even reasonably well.

Red Hat has even shifted their calendars to Google .. does anyone think
if an enterprise calendar that really worked was out there they would
not be using it?



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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Andrew Holway]

>
> So, you'd say a company should use outside email? I would very strongly
> suggest that's a BAD idea. For example, when M$ sucked all our local
> Exchange accounts to their cloud, I understand (I'm not in that group)
> that this was a one-way deal. From a friend, who's a consultant, he was
> dealing with a client who'd let M$ do that when they went to Win10, and
> trying to get the email down for backups, etc, was a nightmare.
>

It depends if the company has a sufficient size to support a production,
mission critical email service. How many engineers to you need to ensure a
proper support rotation? I work mainly in the SME space and haven't seen
self hosted email in over 5 years.

I will admit that the screech of the cloud brigade is often loud and
incoherent but you have to choose your battles. Email is a bitch. It seems,
from a techie point of view, the problem with Microsoft is that they are
forcing an all or nothing approach. If you take Office365 then you must
take the Azure Exchange also which means the core infra guys are pretty
much left high and dry, reduced to helping people install adobe acrobat on
the new Windows10.

I empathise. I've worked as an infrastructure admin and "Devops" engineer
for over 10 years and now my role has been automated away by Kubernetes.
Change is hard.
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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Andrew Holway]

> Andrew, you should understand that you are talking to experts in Linux
> here.
>

No, i was talking to the OP who is seemingly not an expert. Advising those
who not competent that they can set up and run their own mailserver is
probably negligent.

Whipping up Exim and Dovecot for your own private email server is one
thing. Setting up for an organisation is a completely different story.
Mailservers are extremely hard to do well and a job for a specialists. Just
making mail deliverable requires specialist knowledge and keeping an
up-to-date and effective spam filter is near impossible nowadays.
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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[mark]

Andrew Holway wrote:

>>> Still a lot better than trying to run your own hodge-podge of
>>> nightmares on Linux.
>>
>> Beg pardon? Did I make a mistake on the email address? I thought this
>> went to the CentOS general discussion list.
>
> I specifically meant setting up and running email services on linux is
> not for the feint of heart and delivers little real value considering the
> plethora of free and commercial email services available.

So, you'd say a company should use outside email? I would very strongly
suggest that's a BAD idea. For example, when M$ sucked all our local
Exchange accounts to their cloud, I understand (I'm not in that group)
that this was a one-way deal. From a friend, who's a consultant, he was
dealing with a client who'd let M$ do that when they went to Win10, and
trying to get the email down for backups, etc, was a nightmare.

  mark

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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Valeri Galtsev]

On 07/18/18 12:24, Andrew Holway wrote:



Still a lot better than trying to run your own hodge-podge of nightmares
on Linux.


Beg pardon? Did I make a mistake on the email address? I thought this went
to the CentOS general discussion list.



I specifically meant setting up and running email services on linux is not
for the feint of heart and delivers little real value considering the
plethora of free and commercial email services available.


Andrew, you should understand that you are talking to experts in Linux 
here. And even I (and I'm not considering myself an expert in Linux) 
have no trouble to set up mail server on Linux (with all blows and 
whistles like spam/virus filtering, etc).


So, Mark meant to say your posts are offensive to Experts on this list.

Please, take a note of it.

With respect,

Valeri

--

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Sr System Administrator
Department of Astronomy and Astrophysics
Kavli Institute for Cosmological Physics
University of Chicago
Phone: 773-702-4247

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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Alice Wonder]

On 07/18/2018 10:24 AM, Andrew Holway wrote:



Still a lot better than trying to run your own hodge-podge of nightmares
on Linux.


Beg pardon? Did I make a mistake on the email address? I thought this went
to the CentOS general discussion list.



I specifically meant setting up and running email services on linux is not
for the feint of heart and delivers little real value considering the
plethora of free and commercial email services available.


I would disagree.

Postfix and Dovecot are both very well documented.

Running the server yourself protects your users from content scanning by 
the companies that profit from tracking users.


And running itself lets you run DANE for SMTP which makes MITM a lot 
more difficult when the other server you are talking to supports DANE 
for SMTP.


The major e-mail services do not offer that.

Sure it is more work, but it isn't that difficult to get it right.

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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Valeri Galtsev]

On 07/18/18 11:59, mark wrote:

Andrew Holway wrote:





In addition, if you go to 365, you are NOT BUYING the software, you're
renting the service. You will be paying every year, and a service
contract will cost, and, presumably, cost more every year.



Still a lot better than trying to run your own hodge-podge of nightmares
on Linux.


Beg pardon? Did I make a mistake on the email address? I thought this went
to the CentOS general discussion list.


Well, I believe, the long and very polite Johnny's post suggesting OP to 
buy MS service was fundamentally correct. If the person possesses no 
UNIX/Linux knowledge, and not willing dive into learning that, yet has 
great urge to have/run server... well, MS is probably the most right 
place to direct such person to. Whatever one is not willing to pay for 
by one's time and effort, one will pay with money. You and I consider 
this list as last resort when we get stuck with technical problem, but 
some people consider it a first stop. And right answers depend on who is 
asking general advise in which direction to go, so I would recommend to 
OP (but not to UNIX/Linux person...) the same what Johnny had recommended.


And I am the same shocked as you are by someone saying about his Linux 
nightmares. When said on this list that is.


Valeri



mark

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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Andrew Holway]

>
> > Still a lot better than trying to run your own hodge-podge of nightmares
> > on Linux.
>
> Beg pardon? Did I make a mistake on the email address? I thought this went
> to the CentOS general discussion list.
>

I specifically meant setting up and running email services on linux is not
for the feint of heart and delivers little real value considering the
plethora of free and commercial email services available.
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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[mark]

Andrew Holway wrote:
>>

>> In addition, if you go to 365, you are NOT BUYING the software, you're
>> renting the service. You will be paying every year, and a service
>> contract will cost, and, presumably, cost more every year.
>>
>
> Still a lot better than trying to run your own hodge-podge of nightmares
> on Linux.

Beg pardon? Did I make a mistake on the email address? I thought this went
to the CentOS general discussion list.

   mark

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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Valeri Galtsev]

On 07/18/18 11:03, mark wrote:

Turritopsis Dohrnii Teo En Ming wrote:


I am torn between deploying Microsoft Exchange 2016 and Linux-based
SMTP servers like sendmail, postfix, qmail and exim.

Relative ease of installation and configuration is an important
consideration factor.

Microsoft Exchange 2016, Domain Controller, and Active Directory are
relatively easy to install and configure. Linux-based SMTP servers are
extremely difficult to install and configure and of course, extremely
time-consuming.


Based on experience at a number of jobs, Exchange may appear to be easy to
configure, but as soon as you get past the utterly basic configuration,
when management or other departments want more, it then becomes a major
headache.

I work for a US federal contractor these days, on site (civilian sector)
and they just gave up, and moved to M$ cloud for it. And most people HATE
IT.

Searching, if you're not using Outlook, is either terrrible or nonexistant
(they've started auto-archiving here, and I'm hearing there is no search).

In addition, if you go to 365, you are NOT BUYING the software, you're
renting the service. You will be paying every year, and a service contract
will cost, and, presumably, cost more every year.

Linux, once you get over the learning curve, is not that difficult to
administer. and there's a lot of online help (just don't expect us to do
your job for you, as a few folks who've posted here over the years seeem
to expect). You can also get contract help. If that's important, you might
consider upstream, who do provide paid support.

And it will cost a lot less than M$.


One of the features of Microsoft Exchange 2016 is that you can create
additional folders on your Inbox in the server (server-side). Can
Linux-based SMTP servers do that?


I don't know of any mail system that you cannot do that in. Every one
allows that.


Besides the above considerations, how about security? Traditionally,
Linux is far more secure than Windows.


Yup. And fixes come a *LOT* faster, often in hours or days, as opposed to
M$'s "there's no probem, it's your fault (insert one week to three
months), ok, ok, we've got a fix


Judging by security, Linux-based SMTP servers ought to have a higher
percentage of the market share?


Back in the last century, the old mainframe line was "nobody ever lost
their job by recommending IBM"; since the nineties, it's been
"recommending Windows", because that's all they know. We won't say how
much M$ pays, both for advertising, FUD, and illegal under the table
payments to manufacturers.


In my observation it stems from the practices of hiring IT 
professionals. Department or company personnel manager who has no IT 
knowledge (and shouldn't!) has to hire IT manager. Here is where 
certifications came into play (and MS Certifications are plentiful 
around...), so the top guy in the IT position is most likely MS-trained 
guy. And that defines the field of knowledge of the whole IT team 
eventually.


Incidentally, I contradicted myself above, did anybody notice? I told 
about IT manager "trained", and training is different from knowledge, 
simply speaking you just know which buttons to push. But between people 
who possess knowledge (therefore can look deeper even when following 
manual doesn't work) I know almost no one who has even single certificate...


Valeri



Finally, I can only use Windows Server 2016 Standard Evaluation Copy FREE
for a period of 3 years MAXIMUM. But I can use Linux servers and Mail
Transport Agents (MTA) FREE perpetually.


Yup.

   mark

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Kavli Institute for Cosmological Physics
University of Chicago
Phone: 773-702-4247

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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Andrew Holway]

>
> In addition, if you go to 365, you are NOT BUYING the software, you're
> renting the service. You will be paying every year, and a service contract
> will cost, and, presumably, cost more every year.
>

Still a lot better than trying to run your own hodge-podge of nightmares on
Linux.
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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[mark]

Turritopsis Dohrnii Teo En Ming wrote:
>
> I am torn between deploying Microsoft Exchange 2016 and Linux-based
> SMTP servers like sendmail, postfix, qmail and exim.
>
> Relative ease of installation and configuration is an important
> consideration factor.
>
> Microsoft Exchange 2016, Domain Controller, and Active Directory are
> relatively easy to install and configure. Linux-based SMTP servers are
> extremely difficult to install and configure and of course, extremely
> time-consuming.

Based on experience at a number of jobs, Exchange may appear to be easy to
configure, but as soon as you get past the utterly basic configuration,
when management or other departments want more, it then becomes a major
headache.

I work for a US federal contractor these days, on site (civilian sector)
and they just gave up, and moved to M$ cloud for it. And most people HATE
IT.

Searching, if you're not using Outlook, is either terrrible or nonexistant
(they've started auto-archiving here, and I'm hearing there is no search).

In addition, if you go to 365, you are NOT BUYING the software, you're
renting the service. You will be paying every year, and a service contract
will cost, and, presumably, cost more every year.

Linux, once you get over the learning curve, is not that difficult to
administer. and there's a lot of online help (just don't expect us to do
your job for you, as a few folks who've posted here over the years seeem
to expect). You can also get contract help. If that's important, you might
consider upstream, who do provide paid support.

And it will cost a lot less than M$.
>
> One of the features of Microsoft Exchange 2016 is that you can create
> additional folders on your Inbox in the server (server-side). Can
> Linux-based SMTP servers do that?

I don't know of any mail system that you cannot do that in. Every one
allows that.

> Besides the above considerations, how about security? Traditionally,
> Linux is far more secure than Windows.
>
Yup. And fixes come a *LOT* faster, often in hours or days, as opposed to
M$'s "there's no probem, it's your fault (insert one week to three
months), ok, ok, we've got a fix
>
> Judging by security, Linux-based SMTP servers ought to have a higher
> percentage of the market share?

Back in the last century, the old mainframe line was "nobody ever lost
their job by recommending IBM"; since the nineties, it's been
"recommending Windows", because that's all they know. We won't say how
much M$ pays, both for advertising, FUD, and illegal under the table
payments to manufacturers.
>
> Finally, I can only use Windows Server 2016 Standard Evaluation Copy FREE
> for a period of 3 years MAXIMUM. But I can use Linux servers and Mail
> Transport Agents (MTA) FREE perpetually.
>
Yup.

  mark

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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[ldb]

> hi there
>
> I would categorize  Exchange 2016 as "groupware" rather than SMTP server
> per say, because you sent lots of stuff out of Exchange.
>
>
> so to compare Exchange with postfix, exim would not be a proper
> comparison. For Linux based groupware that i know is completely free is
> Kolab (https://www.kolab.org/). its fairly easy to setup. Not sure about
> Zimbra is its Still free as of now.
>

Kopano is available in a free and a paid version and does everything
Exchange does and more (and better):

https://kopano.com/  (paid version)
https://kopano.io/   (community version, testbed)


>
> If you are to use  postfix, exim or sendmail you would need to setup a
> webmail for that and use something like SquirrelMail or Dovecot of
> which  that more a bit complex than just setting up Kolab.
>
>
> So in Short if you ware looking for Exchange equivalent in linux try
> Kolab or Zimbra. don't look at postfix or exim.
>
>
> On 07/18/2018 07:04 PM, Turritopsis Dohrnii Teo En Ming wrote:
>> Good evening from Singapore,
>>
>> I am torn between deploying Microsoft Exchange 2016 and Linux-based
>> SMTP servers like sendmail, postfix, qmail and exim.
>>
>> Relative ease of installation and configuration is an important
>> consideration factor.
>>
>> Microsoft Exchange 2016, Domain Controller, and Active Directory are
>> relatively easy to install and configure. Linux-based SMTP servers are
>> extremely difficult to install and configure and of course, extremely
>> time-consuming.
>>
>> One of the features of Microsoft Exchange 2016 is that you can create
>> additional folders on your Inbox in the server (server-side). Can
>> Linux-based SMTP servers do that?
>>
>> Does Exchange 2016 offer more user-friendly features or Linux-based
>> SMTP servers?
>>
>> Besides the above considerations, how about security? Traditionally,
>> Linux is far more secure than Windows.
>>
>> Judging by security, Linux-based SMTP servers ought to have a higher
>> percentage of the market share?
>>
>> Finally, I can only use Windows Server 2016 Standard Evaluation Copy
>> FREE for a period of 3 years MAXIMUM. But I can use Linux servers and
>> Mail Transport Agents (MTA) FREE perpetually.
>>
>> Please advise.
>>
>> Thank you very much.
>>
>>
>>
>> ===BEGIN SIGNATURE===
>>
>>   Turritopsis Dohrnii Teo En Ming's Academic Qualifications as at 30 Oct
>> 2017
>>
>>   [1] https://tdtemcerts.wordpress.com/
>>
>>  [2] http://tdtemcerts.blogspot.sg/
>>
>>  [3]
>> https://www.scribd.com/user/270125049/Teo-En-Ming
>>
>>  ===END SIGNATURE===
>>
>> ___
>> CentOS mailing list
>> CentOS@centos.org
>> https://lists.centos.org/mailman/listinfo/centos
>
> ___
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>


-- 
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BraHa Systems
NL - Terneuzen
T +31 115 649333

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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Turritopsis Dohrnii Teo En Ming]

Dear Jonathan Billings,


Admittedly, I am a bit confused.


Thank you for enlightening me with more in-depth information.



From: CentOS  on behalf of Jonathan Billings 

Sent: Wednesday, July 18, 2018 11:16 PM
To: centos@centos.org
Subject: Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based 
SMTP Servers?

On Wed, Jul 18, 2018 at 03:04:52PM +, Turritopsis Dohrnii Teo En Ming wrote:
> One of the features of Microsoft Exchange 2016 is that you can create
> additional folders on your Inbox in the server (server-side). Can
> Linux-based SMTP servers do that?
>
> Does Exchange 2016 offer more user-friendly features or Linux-based
> SMTP servers?

I think you're a bit confused about what an SMTP server is.  Exchange
typically provides several services, one of which is SMTP.  Comparing
features of Exchange to similar products in the open source world is
going to be difficult, because Microsoft has a vendor lock-in that
makes it difficult to exactly duplicate every feature.

On Linux, an SMTP server can deliver locally to a file (such as
/var/spool/mail/username) and you can read that file with several
MUAs, but it sounds to me like you're asking if there is a way to have
multiple folders.  That's more like something provided by an IMAP
server.  Typically mail arrives in your mailbox via SMTP, and is then
delivered into a mailbox that is read by a completely separate service
that provides the IMAP protocol (or POP3, but I hope not).  IMAP
servers can provide you with many different 'folders' and not just an
INBOX.

There are several IMAP servers for CentOS, for ease of setup I suggest
dovecot.  If you need a webmail client for your mail service, I
suggest RoundCube (package name: roundcubemail).  I prefer postfix for
SMTP although there's also sendmail and exim.

--
Jonathan Billings 
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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[thoms]

Sorry for top posting...

Before making any decisions, I would absolutely look at Zimbra.

https://www.zimbra.com/



On 07/18/2018 11:42 AM, Turritopsis Dohrnii Teo En Ming wrote:
> Dear Promise Kumalo,
>
>
> Thank you for the recommendations.
>
>
> So for Exchange equivalents in the Linux world, it is Zimbra and Kolab.
>
>
> 
> From: CentOS  on behalf of Promise Kumalo 
> 
> Sent: Wednesday, July 18, 2018 11:38 PM
> To: centos@centos.org
> Subject: Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based 
> SMTP Servers?
>
> hi there
>
> I would categorize  Exchange 2016 as "groupware" rather than SMTP server
> per say, because you sent lots of stuff out of Exchange.
>
>
> so to compare Exchange with postfix, exim would not be a proper
> comparison. For Linux based groupware that i know is completely free is
> Kolab (https://www.kolab.org/). its fairly easy to setup. Not sure about
> Zimbra is its Still free as of now.
>
>
> If you are to use  postfix, exim or sendmail you would need to setup a
> webmail for that and use something like SquirrelMail or Dovecot of
> which  that more a bit complex than just setting up Kolab.
>
>
> So in Short if you ware looking for Exchange equivalent in linux try
> Kolab or Zimbra. don't look at postfix or exim.
>
>
> On 07/18/2018 07:04 PM, Turritopsis Dohrnii Teo En Ming wrote:
>> Good evening from Singapore,
>>
>> I am torn between deploying Microsoft Exchange 2016 and Linux-based
>> SMTP servers like sendmail, postfix, qmail and exim.
>>
>> Relative ease of installation and configuration is an important
>> consideration factor.
>>
>> Microsoft Exchange 2016, Domain Controller, and Active Directory are
>> relatively easy to install and configure. Linux-based SMTP servers are
>> extremely difficult to install and configure and of course, extremely
>> time-consuming.
>>
>> One of the features of Microsoft Exchange 2016 is that you can create
>> additional folders on your Inbox in the server (server-side). Can
>> Linux-based SMTP servers do that?
>>
>> Does Exchange 2016 offer more user-friendly features or Linux-based
>> SMTP servers?
>>
>> Besides the above considerations, how about security? Traditionally,
>> Linux is far more secure than Windows.
>>
>> Judging by security, Linux-based SMTP servers ought to have a higher 
>> percentage of the market share?
>>
>> Finally, I can only use Windows Server 2016 Standard Evaluation Copy FREE 
>> for a period of 3 years MAXIMUM. But I can use Linux servers and Mail 
>> Transport Agents (MTA) FREE perpetually.
>>
>> Please advise.
>>
>> Thank you very much.
>>
>>
>>
>> ===BEGIN SIGNATURE===
>>
>>   Turritopsis Dohrnii Teo En Ming's Academic Qualifications as at 30 Oct 2017
>>
>>   [1] https://tdtemcerts.wordpress.com/
> Turritopsis Dohrnii Teo En Ming's Academic Qualifications – Historical 
> Records, Office of the Grand Historian<https://tdtemcerts.wordpress.com/>
> tdtemcerts.wordpress.com
> Historical Records, Office of the Grand Historian
>
>
>
>> <https://tdtemcerts.wordpress.com/> [2] http://tdtemcerts.blogspot.sg/
> [https://s0.wp.com/i/blank.jpg]<https://tdtemcerts.wordpress.com/>
>
> Turritopsis Dohrnii Teo En Ming's Academic Qualifications – Historical 
> Records, Office of the Grand Historian<https://tdtemcerts.wordpress.com/>
> tdtemcerts.wordpress.com
> Historical Records, Office of the Grand Historian
>
>
>
>> <http://tdtemcerts.blogspot.sg/> [3] 
>> https://www.scribd.com/user/270125049/Teo-En-Ming
>>
>> <https://www.scribd.com/user/270125049/Teo-En-Ming> ===END SIGNATURE===
>>
>> ___
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>> https://lists.centos.org/mailman/listinfo/centos
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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Turritopsis Dohrnii Teo En Ming]

Dear Promise Kumalo,


Thank you for the recommendations.


So for Exchange equivalents in the Linux world, it is Zimbra and Kolab.



From: CentOS  on behalf of Promise Kumalo 

Sent: Wednesday, July 18, 2018 11:38 PM
To: centos@centos.org
Subject: Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based 
SMTP Servers?

hi there

I would categorize  Exchange 2016 as "groupware" rather than SMTP server
per say, because you sent lots of stuff out of Exchange.


so to compare Exchange with postfix, exim would not be a proper
comparison. For Linux based groupware that i know is completely free is
Kolab (https://www.kolab.org/). its fairly easy to setup. Not sure about
Zimbra is its Still free as of now.


If you are to use  postfix, exim or sendmail you would need to setup a
webmail for that and use something like SquirrelMail or Dovecot of
which  that more a bit complex than just setting up Kolab.


So in Short if you ware looking for Exchange equivalent in linux try
Kolab or Zimbra. don't look at postfix or exim.


On 07/18/2018 07:04 PM, Turritopsis Dohrnii Teo En Ming wrote:
> Good evening from Singapore,
>
> I am torn between deploying Microsoft Exchange 2016 and Linux-based
> SMTP servers like sendmail, postfix, qmail and exim.
>
> Relative ease of installation and configuration is an important
> consideration factor.
>
> Microsoft Exchange 2016, Domain Controller, and Active Directory are
> relatively easy to install and configure. Linux-based SMTP servers are
> extremely difficult to install and configure and of course, extremely
> time-consuming.
>
> One of the features of Microsoft Exchange 2016 is that you can create
> additional folders on your Inbox in the server (server-side). Can
> Linux-based SMTP servers do that?
>
> Does Exchange 2016 offer more user-friendly features or Linux-based
> SMTP servers?
>
> Besides the above considerations, how about security? Traditionally,
> Linux is far more secure than Windows.
>
> Judging by security, Linux-based SMTP servers ought to have a higher 
> percentage of the market share?
>
> Finally, I can only use Windows Server 2016 Standard Evaluation Copy FREE for 
> a period of 3 years MAXIMUM. But I can use Linux servers and Mail Transport 
> Agents (MTA) FREE perpetually.
>
> Please advise.
>
> Thank you very much.
>
>
>
> ===BEGIN SIGNATURE===
>
>   Turritopsis Dohrnii Teo En Ming's Academic Qualifications as at 30 Oct 2017
>
>   [1] https://tdtemcerts.wordpress.com/
Turritopsis Dohrnii Teo En Ming's Academic Qualifications – Historical Records, 
Office of the Grand Historian<https://tdtemcerts.wordpress.com/>
tdtemcerts.wordpress.com
Historical Records, Office of the Grand Historian



>
> <https://tdtemcerts.wordpress.com/> [2] http://tdtemcerts.blogspot.sg/
[https://s0.wp.com/i/blank.jpg]<https://tdtemcerts.wordpress.com/>

Turritopsis Dohrnii Teo En Ming's Academic Qualifications – Historical Records, 
Office of the Grand Historian<https://tdtemcerts.wordpress.com/>
tdtemcerts.wordpress.com
Historical Records, Office of the Grand Historian



>
> <http://tdtemcerts.blogspot.sg/> [3] 
> https://www.scribd.com/user/270125049/Teo-En-Ming
>
> <https://www.scribd.com/user/270125049/Teo-En-Ming> ===END SIGNATURE===
>
> ___
> CentOS mailing list
> CentOS@centos.org
> https://lists.centos.org/mailman/listinfo/centos

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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Promise Kumalo]

hi there

I would categorize  Exchange 2016 as "groupware" rather than SMTP server 
per say, because you sent lots of stuff out of Exchange.


so to compare Exchange with postfix, exim would not be a proper 
comparison. For Linux based groupware that i know is completely free is 
Kolab (https://www.kolab.org/). its fairly easy to setup. Not sure about 
Zimbra is its Still free as of now.


If you are to use  postfix, exim or sendmail you would need to setup a 
webmail for that and use something like SquirrelMail or Dovecot of 
which  that more a bit complex than just setting up Kolab.


So in Short if you ware looking for Exchange equivalent in linux try 
Kolab or Zimbra. don't look at postfix or exim.


On 07/18/2018 07:04 PM, Turritopsis Dohrnii Teo En Ming wrote:
> Good evening from Singapore,
>
> I am torn between deploying Microsoft Exchange 2016 and Linux-based
> SMTP servers like sendmail, postfix, qmail and exim.
>
> Relative ease of installation and configuration is an important
> consideration factor.
>
> Microsoft Exchange 2016, Domain Controller, and Active Directory are
> relatively easy to install and configure. Linux-based SMTP servers are
> extremely difficult to install and configure and of course, extremely
> time-consuming.
>
> One of the features of Microsoft Exchange 2016 is that you can create
> additional folders on your Inbox in the server (server-side). Can
> Linux-based SMTP servers do that?
>
> Does Exchange 2016 offer more user-friendly features or Linux-based
> SMTP servers?
>
> Besides the above considerations, how about security? Traditionally,
> Linux is far more secure than Windows.
>
> Judging by security, Linux-based SMTP servers ought to have a higher 
> percentage of the market share?
>
> Finally, I can only use Windows Server 2016 Standard Evaluation Copy FREE for 
> a period of 3 years MAXIMUM. But I can use Linux servers and Mail Transport 
> Agents (MTA) FREE perpetually.
>
> Please advise.
>
> Thank you very much.
>
>
>
> ===BEGIN SIGNATURE===
>
>   Turritopsis Dohrnii Teo En Ming's Academic Qualifications as at 30 Oct 2017
>
>   [1] https://tdtemcerts.wordpress.com/
>
>  [2] http://tdtemcerts.blogspot.sg/
>
>  [3] 
> https://www.scribd.com/user/270125049/Teo-En-Ming
>
>  ===END SIGNATURE===
>
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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Jos Vos]

On Wed, Jul 18, 2018 at 03:04:52PM +, Turritopsis Dohrnii Teo En Ming wrote:

> Microsoft Exchange 2016, Domain Controller, and Active Directory are
> relatively easy to install and configure. Linux-based SMTP servers are
> extremely difficult to install and configure and of course, extremely
> time-consuming.

These are extremely subjective statements.  For me, I would not be able
to set up Microsoft servers in less than 10 or maybe even 100 times the
time it costs me to set up similar Linux servers.

To refer to an old joke, that is in fact very true: "UNIX/Linux is very
user-friendly, it's just very selective about who its friends are" :-).

-- 
--Jos Vos 
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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Johnny Hughes]

On 07/18/2018 10:04 AM, Turritopsis Dohrnii Teo En Ming wrote:
> Good evening from Singapore,
> 
> I am torn between deploying Microsoft Exchange 2016 and Linux-based
> SMTP servers like sendmail, postfix, qmail and exim.
> 
> Relative ease of installation and configuration is an important
> consideration factor.
> 
> Microsoft Exchange 2016, Domain Controller, and Active Directory are
> relatively easy to install and configure. Linux-based SMTP servers are
> extremely difficult to install and configure and of course, extremely
> time-consuming.
> 
> One of the features of Microsoft Exchange 2016 is that you can create
> additional folders on your Inbox in the server (server-side). Can
> Linux-based SMTP servers do that?
> 
> Does Exchange 2016 offer more user-friendly features or Linux-based
> SMTP servers?
> 
> Besides the above considerations, how about security? Traditionally,
> Linux is far more secure than Windows.
> 
> Judging by security, Linux-based SMTP servers ought to have a higher 
> percentage of the market share?
> 
> Finally, I can only use Windows Server 2016 Standard Evaluation Copy FREE for 
> a period of 3 years MAXIMUM. But I can use Linux servers and Mail Transport 
> Agents (MTA) FREE perpetually.
> 
> Please advise.

You would need to use other pieces besides just the SMTP aspect if using
Linux.  (ie, you would need an IMAP server, a Web front end (like
Roundcube).

The main issue is still going to be calendaring.  To be perfectly honest
and frank here .. NONE of the Linux based calendaring solutions are good
enough (IMHO) for major business use.

As much as it pains me to say it, I would personally recommend either
office365 or googleapps for mail if I were currently a SysAdmin making
recommendations for a company of moderate size.  If you HAVE to run a
local server, then again, as much as it pains me to say it .. I would
use Exchange because of the terrible calendaring on Linux based solutions.

There are some suites out there that run on Linux and provide some
decent calendaring (zimba, iredmail, kolab, etc.)  But my personal
experience managing those (and using them) is that they are subpar to
the google calendar or exchange calendar solutions.

That said, there are a bunch of other pieces (like SPAM filtering, virus
scanning, etc.) and all of that adds to the cost of an Exchange
solution.  And you really can't just ignore those things in 2018 anymore
.. so certainly a Linux based on premise solution would be cheaper to
maintain.

People say that office365 and googleapps solutions are too expensive,
but my experience tells me that if you factor in all costs (including
hardware and sysadmin time, etc.), and look at quality of service
(especially calendaring), those services are competitive.





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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Nux!]

If you find setting up a linux based smtp server "extremely difficult", then 
you have probably answered your own question already.
Stick to what you know.

hth

--
Sent from the Delta quadrant using Borg technology!

Nux!
www.nux.ro

- Original Message -
> From: "Turritopsis Dohrnii Teo En Ming" 
> To: "CentOS mailing list" 
> Sent: Wednesday, 18 July, 2018 16:04:52
> Subject: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based 
> SMTP Servers?

> Good evening from Singapore,
> 
> I am torn between deploying Microsoft Exchange 2016 and Linux-based
> SMTP servers like sendmail, postfix, qmail and exim.
> 
> Relative ease of installation and configuration is an important
> consideration factor.
> 
> Microsoft Exchange 2016, Domain Controller, and Active Directory are
> relatively easy to install and configure. Linux-based SMTP servers are
> extremely difficult to install and configure and of course, extremely
> time-consuming.
> 
> One of the features of Microsoft Exchange 2016 is that you can create
> additional folders on your Inbox in the server (server-side). Can
> Linux-based SMTP servers do that?
> 
> Does Exchange 2016 offer more user-friendly features or Linux-based
> SMTP servers?
> 
> Besides the above considerations, how about security? Traditionally,
> Linux is far more secure than Windows.
> 
> Judging by security, Linux-based SMTP servers ought to have a higher 
> percentage
> of the market share?
> 
> Finally, I can only use Windows Server 2016 Standard Evaluation Copy FREE for 
> a
> period of 3 years MAXIMUM. But I can use Linux servers and Mail Transport
> Agents (MTA) FREE perpetually.
> 
> Please advise.
> 
> Thank you very much.
> 
> 
> 
> ===BEGIN SIGNATURE===
> 
> Turritopsis Dohrnii Teo En Ming's Academic Qualifications as at 30 Oct 2017
> 
> [1] https://tdtemcerts.wordpress.com/
> 
> <https://tdtemcerts.wordpress.com/> [2] http://tdtemcerts.blogspot.sg/
> 
> <http://tdtemcerts.blogspot.sg/> [3]
> https://www.scribd.com/user/270125049/Teo-En-Ming
> 
> <https://www.scribd.com/user/270125049/Teo-En-Ming> ===END SIGNATURE===
> 
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Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Jonathan Billings]

On Wed, Jul 18, 2018 at 03:04:52PM +, Turritopsis Dohrnii Teo En Ming wrote:
> One of the features of Microsoft Exchange 2016 is that you can create
> additional folders on your Inbox in the server (server-side). Can
> Linux-based SMTP servers do that?
> 
> Does Exchange 2016 offer more user-friendly features or Linux-based
> SMTP servers?

I think you're a bit confused about what an SMTP server is.  Exchange
typically provides several services, one of which is SMTP.  Comparing
features of Exchange to similar products in the open source world is
going to be difficult, because Microsoft has a vendor lock-in that
makes it difficult to exactly duplicate every feature.

On Linux, an SMTP server can deliver locally to a file (such as
/var/spool/mail/username) and you can read that file with several
MUAs, but it sounds to me like you're asking if there is a way to have
multiple folders.  That's more like something provided by an IMAP
server.  Typically mail arrives in your mailbox via SMTP, and is then
delivered into a mailbox that is read by a completely separate service
that provides the IMAP protocol (or POP3, but I hope not).  IMAP
servers can provide you with many different 'folders' and not just an
INBOX. 

There are several IMAP servers for CentOS, for ease of setup I suggest
dovecot.  If you need a webmail client for your mail service, I
suggest RoundCube (package name: roundcubemail).  I prefer postfix for
SMTP although there's also sendmail and exim.

-- 
Jonathan Billings 
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[CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[Turritopsis Dohrnii Teo En Ming]

Good evening from Singapore,

I am torn between deploying Microsoft Exchange 2016 and Linux-based
SMTP servers like sendmail, postfix, qmail and exim.

Relative ease of installation and configuration is an important
consideration factor.

Microsoft Exchange 2016, Domain Controller, and Active Directory are
relatively easy to install and configure. Linux-based SMTP servers are
extremely difficult to install and configure and of course, extremely
time-consuming.

One of the features of Microsoft Exchange 2016 is that you can create
additional folders on your Inbox in the server (server-side). Can
Linux-based SMTP servers do that?

Does Exchange 2016 offer more user-friendly features or Linux-based
SMTP servers?

Besides the above considerations, how about security? Traditionally,
Linux is far more secure than Windows.

Judging by security, Linux-based SMTP servers ought to have a higher percentage 
of the market share?

Finally, I can only use Windows Server 2016 Standard Evaluation Copy FREE for a 
period of 3 years MAXIMUM. But I can use Linux servers and Mail Transport 
Agents (MTA) FREE perpetually.

Please advise.

Thank you very much.



===BEGIN SIGNATURE===

 Turritopsis Dohrnii Teo En Ming's Academic Qualifications as at 30 Oct 2017

 [1] https://tdtemcerts.wordpress.com/

 [2] http://tdtemcerts.blogspot.sg/

 [3] 
https://www.scribd.com/user/270125049/Teo-En-Ming

 ===END SIGNATURE===

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