IMAP(-SSL) problems!

[jorizzzz]

I've got big problems with IMAP on both of my servers. I get often a message from my customers that the IMAP server could not be reached...

I have tried it myself and at first everything worked perfectly, but after a while i also got the error message that the server could not be contacted. It is definitely a software problem, because i've got two servers on two different locations that show the exact same problem.

I can't seem to find anything in the log files.. Better said, i can't seem to find any log files generated by courier?!

Could somebody please help me?

[falko]

Are there any errors in your mail log? Do you use something like Denyhosts, Blockhosts, or fail2ban? If so, maybe you've locked yourself out because you were trying a wrong password too often.

[tensor]

You may try "grep courier /var/log/mail.log". /var/log/mail.log is a default log file in Debian. In your distro it may be different.

[jorizzzz]

I've looked at the log files again. And it seems that courier is logging in mail.info, mail.log and syslog..

Couldn't find anything intereseting though, only a whole bunch of login's and logout's.

I did find a small section with 7 or 8 times this line:
imapd-ssl: couriertls: read: Connection reset by peer

But that was all in the same second and i can't find it anywhere else in the log files.

This really is a strange problem. It works, but after a while it suddenly stops working. And a while later it works again. All this without writing anything to the log files.

Is there a way to enable debugging for courier and send those lines to a different log file?

[falko]

Are there any errors in the other logs, e.g. syslog?

[jorizzzz]

Originally Posted by falko

Are there any errors in the other logs, e.g. syslog?

Nothing relative to this...

What i did notice is that all the information from mail.info and mail.err also appears in syslog. How can i change this? I only want important things in syslog, not a log that some user has logged in to courier to check his mail. That can go in mail.info

Also another little thing, I often get the message from my system that some user is almost over his quota. Is there any way to disable this? I only want to know this if someone is over his quota...

[falko]

Originally Posted by jorizzzz

What i did notice is that all the information from mail.info and mail.err also appears in syslog. How can i change this? I only want important things in syslog, not a log that some user has logged in to courier to check his mail. That can go in mail.info

Take a look at

man 5 syslog.conf

Originally Posted by jorizzzz

Also another little thing, I often get the message from my system that some user is almost over his quota. Is there any way to disable this? I only want to know this if someone is over his quota...

You must set the $threshold value in /root/ispconfig/scripts/shell/quota_msg.php to 1.