Advise needed for new mail server

[Mufit Eribol via Info-cyrus]

Hello,

I have been successfully using postfix+cyrus-imapd (2.4.17) for our 
small company for years on our local server. The emails are now 
accounting to a size of  some 160GB. As we are having power and internet 
problems quite often, I rented a VPS from a world renowned hosting 
company and installed postfix+cyrus-imapd there.


My question is, as I have limited hard disk space (40GB) on VPS, I can't 
(and don't want to) copy all of my local emails to the VPS. The new mail 
server will have a fresh start. But old emails needs to be accessible on 
the local server as well.


Currently, I am planning to change the names of local domains to some 
non-existent name just for the internal lookup (example.com --> 
example2.com), so that we can setup example2.com on our email clients on 
lan. The real domain example.com will be setup on our desktop email 
clients as usual. I think, using example2.com on local lan just for 
reading mails by cyrus will work, but it is not an elegant solution.


I would appreciate any ideas.

Regards,
Mufit Eribol


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Cyrus IMAP 2.4 to 2.5 replication

[Brady, Mike via Info-cyrus]

I am looking at migrating a Cyrus IMAP 2.4 server to 2.5 (actually Kolab 
3.1 to 3.4) and was wondering if it was safe to use the built in 
replication between the releases.


Thanks

Mike

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Re: Advise needed for new mail server

[Michael Menge via Info-cyrus]

Hi Mufit,

Quoting Mufit Eribol via Info-cyrus :


Hello,

I have been successfully using postfix+cyrus-imapd (2.4.17) for our  
small company for years on our local server. The emails are now  
accounting to a size of  some 160GB. As we are having power and  
internet problems quite often, I rented a VPS from a world renowned  
hosting company and installed postfix+cyrus-imapd there.


My question is, as I have limited hard disk space (40GB) on VPS, I  
can't (and don't want to) copy all of my local emails to the VPS.  
The new mail server will have a fresh start. But old emails needs to  
be accessible on the local server as well.


Currently, I am planning to change the names of local domains to  
some non-existent name just for the internal lookup (example.com -->  
example2.com), so that we can setup example2.com on our email  
clients on lan. The real domain example.com will be setup on our  
desktop email clients as usual. I think, using example2.com on local  
lan just for reading mails by cyrus will work, but it is not an  
elegant solution.


I would appreciate any ideas.




Cyrus Murder my be the solution for you.
https://cyrusimap.org/mediawiki/index.php/Cyrus_Murder

The Clients will only connect to one server (VPS), and the mails can  
be stored on different
backend servers. There is only minimal configuration change needed on  
your old server, but you

would need to rename the folders.


1 backend (VPS) for the INBOX and folders with new Mail
1 backend (old System) with all old folders in an archive subfolder  
for each user

1 mupdate master (VPS)
1 frontend (VPS)


Regards

   Michael Menge



M.MengeTel.: (49) 7071/29-70316
Universität Tübingen   Fax.: (49) 7071/29-5912
Zentrum für Datenverarbeitung  mail:  
michael.me...@zdv.uni-tuebingen.de

Wächterstraße 76
72074 Tübingen


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Re: Advise needed for new mail server

[lst_hoe02--- via Info-cyrus]

Zitat von Michael Menge via Info-cyrus :


Hi Mufit,

Quoting Mufit Eribol via Info-cyrus :


Hello,

I have been successfully using postfix+cyrus-imapd (2.4.17) for our  
small company for years on our local server. The emails are now  
accounting to a size of  some 160GB. As we are having power and  
internet problems quite often, I rented a VPS from a world renowned  
hosting company and installed postfix+cyrus-imapd there.


My question is, as I have limited hard disk space (40GB) on VPS, I  
can't (and don't want to) copy all of my local emails to the VPS.  
The new mail server will have a fresh start. But old emails needs  
to be accessible on the local server as well.


Currently, I am planning to change the names of local domains to  
some non-existent name just for the internal lookup (example.com  
--> example2.com), so that we can setup example2.com on our email  
clients on lan. The real domain example.com will be setup on our  
desktop email clients as usual. I think, using example2.com on  
local lan just for reading mails by cyrus will work, but it is not  
an elegant solution.


I would appreciate any ideas.




Cyrus Murder my be the solution for you.
https://cyrusimap.org/mediawiki/index.php/Cyrus_Murder

The Clients will only connect to one server (VPS), and the mails can  
be stored on different
backend servers. There is only minimal configuration change needed  
on your old server, but you

would need to rename the folders.


1 backend (VPS) for the INBOX and folders with new Mail
1 backend (old System) with all old folders in an archive subfolder  
for each user

1 mupdate master (VPS)
1 frontend (VPS)


Regards

   Michael Menge



Depending on the mail clients used and the number of clients you can  
also simply setup the new server as a additional IMAP Account and  
disable the (incoming) SMTP service on the old server. With this you  
will have the internal IMAP server as "archive" with a lot of storage  
and the new server for internet related traffic.


Regards

Andreas



smime.p7s
Description: S/MIME Cryptographic Signature

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Re: PATCH for lmtp was [frontend lmtp connections to mupdate master]

[Michael Menge via Info-cyrus]

Hi,

https://cyrusimap.org/mediawiki/index.php/Cyrus_Murder_Failure_Modes
"2. Mail delivery via the frontends is deferred (lmtpproxyd cannot  
locate mailbox). "

should be updated too

Quoting Ken Murchison :


Done.


On 11/17/2015 03:29 AM, Michael Menge wrote:

Hi Ken

thanks. Do you intend to patch 2.4.x and 2.5.x ?

I am a bit confused by the recent changes of cyrusimap and cyrus.fondation.
Is the bugtracker https://bugzilla.cyrusimap.org still used by the project?
If yes, you should close  
https://bugzilla.cyrusimap.org/show_bug.cgi?id=3866,
if not, someone should add some information where the new  
bugtracker can be found


Regards

  Michael



Quoting Ken Murchison :

I committed a revised version just a little while ago:  
https://git.cyrus.foundation/rI0fd86ca759ffa32e8d22dbdde78ea82d63650827




On 11/16/2015 04:41 AM, Michael Menge via Info-cyrus wrote:

Hi,

is there anything missing from my side, or something that I can do to help
that my patch can be included?

Regards

  Michael


Quoting Nic Bernstein via Info-cyrus :


Bron,
We're starting to run into this same issue -- lmtp proxies fail  
to deliver mail when mupdate master craps -- and so started to  
investigate this thread.  However, it doesn't look like Michael  
Menge's patch made it in.  Your thoughts?

  -nic

On 10/07/2014 08:17 AM, Bron Gondwana wrote:
I'm convinced :)  I'll probably add it with Ken while we're at  
CMU in a couple of weeks when we can test it together.  This is  
precisely the kind of thing we love to see!  Thanks.


Bron.

On Tue, Oct 7, 2014, at 10:23 PM, Michael Menge wrote:

Hi,

as we have had an other crash of mupdate master last week, we used the
patch on our production system.

After the patch was added the load on mupdate master was dropping form
about 10 to about 1.

After one week of using it we have not found any problems.
As I have not received any other feedback, I added it to the
bugtracker.

https://bugzilla.cyrusimap.org/show_bug.cgi?id=3866

Pleas consider adding it to 2.5 and 2.4.next

Regards

  Michael


Quoting Michael Menge :


Hi,


Quoting Michael Menge :


Quoting Michael Menge :

By thew way, the reason I was so surprised in the first  
place was, that

I have been fooled by the documentation:
Quoting  
https://cyrusimap.org/docs/cyrus-imapd/2.4.17/install-murder.php



Configuring the frontends
[...]
However, because the frontends only talk to the mupdate master
via   a  slave running on the local machine, you will also need
to set  up  a  slave on the same machine, in the SERVICES section
of   cyrus.conf,  like so

And an other misleading DOC !
Quoting
http://www.cyrusimap.org/mediawiki/index.php/Cyrus_Murder_Mail_Delivery

UMich patch

Patch Patches are against 2.2 but are being moved to 2.3
Lmtpproxyd   will now use the local mailboxes.db

Quoting Wesley Craig :


On 29 Sep 2014, at 10:08, Michael Menge
 wrote:

thanks for your mail. By any chance do you still have the patch?

In fact, I don't.  Dusting off my notes, I recall now that instead
of patching this (bogus) code, we instead decided to configure the
frontends as "unified", while leaving the backends "standard".  The
only downside of this approach was that a naive admin could
potentially create a user's mailbox on a frontend.

Sorry I said that we ported that code forward: in fact we simply
got  the effect of consulting mailboxes.db without porting forward.

:wes

I have patched my lmtpd to use the local mailbox.db in all cases,
unified Murder, and standalone cyrus already did this.
I tested it with a few testmails on my test system,
but as i don't have a unified setup or a standalone test system
at the moment i didn't test these setups.

I would appreciate a review.


Regards,

 Michael Menge


 M.MengeTel.: (49)  
7071/29-70316

Universität Tübingen   Fax.: (49) 7071/29-5912
Zentrum für Datenverarbeitung  mail:
michael.me...@zdv.uni-tuebingen.de
Wächterstraße 76
72074 Tübingen




 M.MengeTel.: (49)  
7071/29-70316

Universität Tübingen   Fax.: (49) 7071/29-5912
Zentrum für Datenverarbeitung  mail:
michael.me...@zdv.uni-tuebingen.de
Wächterstraße 76
72074 Tübingen

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--
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Onlight, Inc.