Re: [CentOS] Mail Server Guides

[Alice Wonder]

On 3/4/19 5:40 AM, Robert Moskowitz wrote:



On 3/1/19 12:53 PM, Ben Archuleta wrote:

Hello All,


I need to set up a new mail server to replace an aging CentOS 6.3 mail 
server. I was wondering what were some of the best guides on the web 
for Postfix (Maildir), Spamassassin, ClamAV, Dovecot?


I am close to upgrading my mailserver.  My current instructions are at:

http://www.htt-consult.com/Centos7-mailserver.html

I need to finish:

SHA256 or SHA512 instead of MD5 for the password (Just need to finish up 
the roundcube password change script)

dovecotadm backup for the mail
and something to backup the mysql

Otherwise my testing has been good.

Of course adding stuff like DKIM, DANE, etc.  would be nice.


Note with DKIM - OpenDKIM defaults to 1024-bit RSA but that is no longer 
recommended and some services no longer consider it valid. 2048-bit RSA 
is the current recommended.


The problem is that since DKIM keys do not expire, sysadmins got lazy 
and never bothered to periodically generate new ones, making 1024-bit 
RSA unsuitable.


Ed25519 is also now available but support for it is not wide-spread yet.

___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Mail Server Guides

[Robert Moskowitz]

On 3/1/19 12:53 PM, Ben Archuleta wrote:

Hello All,


I need to set up a new mail server to replace an aging CentOS 6.3 mail server. 
I was wondering what were some of the best guides on the web for Postfix 
(Maildir), Spamassassin, ClamAV, Dovecot?


I am close to upgrading my mailserver.  My current instructions are at:

http://www.htt-consult.com/Centos7-mailserver.html

I need to finish:

SHA256 or SHA512 instead of MD5 for the password (Just need to finish up 
the roundcube password change script)

dovecotadm backup for the mail
and something to backup the mysql

Otherwise my testing has been good.

Of course adding stuff like DKIM, DANE, etc.  would be nice.

I am running my mailserver on an Odroid HC1.  Nice little system


___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Mail Server Guides

[Kenneth Porter]

--On Sunday, March 03, 2019 1:30 PM +0100 Adrian van Bloois 
 wrote:



I need to set up a new mail server to replace an aging CentOS 6.3 mail
server. I was wondering what were some of the best guides on the web for
Postfix (Maildir), Spamassassin, ClamAV, Dovecot?


In the list I miss a program to control clamav and spamassassin.
Many people use amavis, but my experience is not very favoufable with
this script.
I personally prefer MailScaaner


I like MIMEDefang for this. Install it with yum and then edit your MTA 
config to hook it up. It runs as a "milter" (mail filter) plugin in your 
MTA (Sendmail or Postfix) and a service that performs the scanning. A Perl 
script invokes SpamAssassin and/or ClamAV (and other similar programs) on 
each message part. A stock script is provided which you customize to 
implement your site policy. A commercial version with paid support is also 
available, with lots of nice management bells and whistles. Join the 
mailing list to get help operating it.





___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Mail Server Guides

[Adrian van Bloois]

Am 01.03.19 um 18:53 schrieb Ben Archuleta:

> I need to set up a new mail server to replace an aging CentOS 6.3 mail 
> server. I was wondering what were some of the best guides on the web for 
> Postfix (Maildir), Spamassassin, ClamAV, Dovecot?

In the list I miss a program to control clamav and spamassassin.
Many people use amavis, but my experience is not very favoufable with
this script.
I personally prefer MailScaaner, have a look at:
www.mailscanner.info for further details.
I use, and have used, this set in many circomstances even in large
commercial envrionments, and I'm very pleased with it, functinally
and in terms of stability.

Good luck
Adrian



-- 
Adri P. van Bloois


"Elegance is not a dispensable luxury but a factor that decides between 
 success and failure."
Edsger W. Dijkstra
___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Mail Server Guides

[Django via CentOS]

HI,

Am 01.03.19 um 18:53 schrieb Ben Archuleta:

> I need to set up a new mail server to replace an aging CentOS 6.3 mail 
> server. I was wondering what were some of the best guides on the web for 
> Postfix (Maildir), Spamassassin, ClamAV, Dovecot?

I use this one here:
https://dokuwiki.nausch.org/doku.php/centos:mail_c7:start

Baybe ist helps alittle bit ...


cu
Django
___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Mail Server Guides

[Michael Peters]

Sorry, here's the guide I just started.

https://gitlab.com/Pipfrosch/smtp-secure-relay-policy

Why from a different e-mail address?

That's something the list admins need to look into, it seems every time I
post to this list within seconds I end up on Spamhaus blacklist.

Doesn't happen elsewhere, just this list, and it's annoying as hell.

On Fri, Mar 1, 2019 at 10:09 AM Alice Wonder  wrote:

> On 3/1/19 9:53 AM, Ben Archuleta wrote:
> > Hello All,
> >
> >
> > I need to set up a new mail server to replace an aging CentOS 6.3 mail
> server. I was wondering what were some of the best guides on the web for
> Postfix (Maildir), Spamassassin, ClamAV, Dovecot?
> >
>
> Probably not what you are looking for and it still has bugs, but I just
> (within last five days) started this project for securing outbound SMTP
> from a Postfix server, taking DANE, MTA-STS, and STARTTLS Everywhere
> policies into consideration.
>
> One thing I will note, don't use the Postfix that ships with CentOS 7.x.
> It was fine when 7.0 shipped, but you really want to be using 3.2 or
> newer now.
>
> ___
> CentOS mailing list
> CentOS@centos.org
> https://lists.centos.org/mailman/listinfo/centos
>


-- 
*Notice*: Gmail is owned by Google, a company that made its fortune in
content indexing and user tracking. It is logical therefore to assume that
Google and quite possibly the government has access to any correspondence
made with this account.

Do not use correspondence with this account for sensitive information.
___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Mail Server Guides

[Jon Pruente]

On Fri, Mar 1, 2019 at 11:53 AM Ben Archuleta  wrote:

> I need to set up a new mail server to replace an aging CentOS 6.3 mail
> server. I was wondering what were some of the best guides on the web for
> Postfix (Maildir), Spamassassin, ClamAV, Dovecot?
>

The one I've seen as a long time recommendation is the ISPMail Guide at
https://workaround.org/ispmail It is Debian centric, but can be adapted to
CentOS.
___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Mail Server Guides

[Alice Wonder]

On 3/1/19 9:53 AM, Ben Archuleta wrote:

Hello All,


I need to set up a new mail server to replace an aging CentOS 6.3 mail server. 
I was wondering what were some of the best guides on the web for Postfix 
(Maildir), Spamassassin, ClamAV, Dovecot?



Probably not what you are looking for and it still has bugs, but I just 
(within last five days) started this project for securing outbound SMTP 
from a Postfix server, taking DANE, MTA-STS, and STARTTLS Everywhere 
policies into consideration.


One thing I will note, don't use the Postfix that ships with CentOS 7.x. 
It was fine when 7.0 shipped, but you really want to be using 3.2 or 
newer now.


___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos

[CentOS] Mail Server Guides

[Ben Archuleta]

Hello All,


I need to set up a new mail server to replace an aging CentOS 6.3 mail server. 
I was wondering what were some of the best guides on the web for Postfix 
(Maildir), Spamassassin, ClamAV, Dovecot?


Regards,
Ben Archuleta
___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos