postfix & dovecot (temporary failure. Command output: Failed to write to log file)

Posted on 2010-09-22
Medium Priority
Last Modified: 2013-12-06
Dear all,

I have a problem with our mail gateway. Since last night the postfix queue will not be flushed after the email is delivered to the dovecot mailbox. The emails are arriving but will not be deleted from the queue. The problem is that this emails are delivered each time the queue is sending.

With postqueue -p command I see this error message:
(temporary failure. Command output: Failed to write to log file)

In the maillog i see this error:
relay=local, delay=0.66, delays=0.14/0/0/0.51, dsn=4.3.0, status=deferred (temporary failure. Command output: Failed to write to log file)

if I check the log file for dovecot "grep "This is Dovecot's" /var/log/*" I get this informations:
/var/log/maillog:Sep 22 08:30:55 mail dovecot: This is Dovecot's info log
/var/log/maillog:Sep 22 08:30:55 mail dovecot: This is Dovecot's warning log
/var/log/maillog:Sep 22 08:30:55 mail dovecot: This is Dovecot's error log
/var/log/maillog:Sep 22 08:30:55 mail dovecot: Fatal: This is Dovecot's fatal log

So for me just the maillog is the log file in use. But I can't see there a problem.

Many thanks in advanced.
Question by:advz
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LVL 17

Accepted Solution

owensleftfoot earned 2000 total points
ID: 33732267
Have a look at http://wiki.dovecot.org/LDA#logging especially the part about Postfix's


Author Comment

ID: 33732405
Dear owensleftfoot,

many thanks for the fast and specially correct answer.
I set the mailbox size higher and now it works again.

But I don't understand the combination! This is the statement from the Dovecot page:
Note that Postfix's mailbox_size_limit setting applies to all files that are written to. So if you have a limit of 50 MB, deliver can't write to log files larger than 50 MB and you'll start getting temporary failures

Does it mean, if the maillog is bigger as 50MB I get this kind of failures?
I have several mail gateways or servers with a bigger size of 50MB of the maillog.
Do you have maybe a link with a description as well.

Again many thanks and kind regards
LVL 17

Expert Comment

ID: 33734926
Im not sure why your other servers are working with a > 50mb log. I would guess different configurations?

Author Comment

ID: 33734962
I will find it out.

Thanks and regards

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