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

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.
Joerg
advzAsked:
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owensleftfootConnect With a Mentor Commented:
Have a look at http://wiki.dovecot.org/LDA#logging especially the part about Postfix's
mailbox_size_limit.

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advzAuthor Commented:
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
Joerg
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owensleftfootCommented:
Im not sure why your other servers are working with a > 50mb log. I would guess different configurations?
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advzAuthor Commented:
I will find it out.

Thanks and regards
Joerg
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