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How to increase group mailing list maximum message size?

I've been using group mailing lists for forwarding mails from our answering machine to a number of users. The answering machine (Fritz!Box) generates wav-files for every incoming message and sends it as a regular mail to a group on the server. After upgrading to Mavericks Sever 3 those mails don't come through anymore.

listserver.log reads:

list_server_post[7750] <Info>: message: xyz.msg from: user@domain posted to: group (size=184314)

list_server_mgr[8254] <Info>: list manager wake event: xyz

list_server_agent[7754] <Info>: list agent started for list ID: xyz

list_server_agent[7754] <Error>: message: abc.msg exceeded maximum message size: 184314 > 40960

list_server_agent[7754] <Info>: moved message: abc.msg to: /Library/Server//Mail/Data/listserver/messages/hold

list_server_agent[7754] <Info>: list agent sleeping for 60 seconds

list_server_agent[7754] <Info>: list agent exited

The maximum message size for mails set using serveradmin is 10MB. Does anyone know of a way to incerease the list_server's maximum message size?

Mac mini, OS X Server

Posted on Oct 30, 2013 11:55 PM

19 replies

andipilz

Level 1

0 points

Mar 8, 2014 6:47 AM in response to kleinholz

GREAT!

This solved all my sorrows (well, the server ones for this topic ;-) ).

Thanks for passing this on. Have a good weekend.

Andi

Stirliz

Level 1

1 points

Mar 18, 2014 1:43 AM in response to kleinholz

Many thanks for solving the issue that was causing trouble for months!

Regarding the messages in the hold folder, these seem to be the ones that got stuck. Where should i move them in order to be able to receive them finally?

Thanks!

Mar 18, 2014 8:57 AM in response to Bob_Hamburg

So, now you all can send a message with, for example, a 12 MB attachment and it will not corrupt the attachment?

My results are that it will only send a piece of the attachments about 100 KB. I talked to support and they said there is a bug on how the attachment is reassembled - something about a counter that pieces the file back together.

The fix above did not change my results. Is this how your MailServicesOther.plist looks at this spot:

<dict>

<key>dest_domain</key>

<string>xxxxxxx.com</string>

<key>enable_list_server</key>

<true/>

<key>host_domain</key>

<string>xxxxxxx.com</string>

<key>list_server_log_level</key>

<key>mail_enabled_groups</key>

<array>

<string>emailtestgroup</string>

</array>

<key>max_message_size</key>

</dict>

Thank you!

Mar 18, 2014 10:58 AM in response to Philip GW

The fix provided by Apple support just enables the list_server script to receive messages exceeding the default size limitation.

As a result we also experienced corrupted attachments on our server. Additionally the prior mentioned start/stop procedure needs to be kicked off every x hours which both is very frustrating.

As a temporary workaround I set back the settings in server.app (removed mail functionality for groups and removed groups i set up for mail) and added aliases to /Library/Server/Mail/Config/postfix/aliases manually. "Group mail" functionality is now handled on postfix level. To be honest I don't want to keep it that way as noone knows what happens to those files when updating server.app.

It seems server.app v3.1 was released today ...

How to increase group mailing list maximum message size?