Mathew Anderson wrote:

Thanks for the pointers here.
The MaxperIP is set at 300 and the maxdaemons is set at 40.

This should be more then enough.

as for the authldaprc : the ldaptimeout is set at 5. I also have nscd
running. I do not think this is the problem either.

Please, if any of you have further ideas, I would love to hear them.



Try changing the ldaptimeout to a higher value, just to eliminate the possibility there, like 60 seconds or so. Also, if the problem only occurs between 5am and 8am, I would make sure that the php session files are not being cleaned up at that time. You can probably reproduce the error by deleting the session file and then clicking around. This would tell you if it is the same type of error or strictly a problem with Courier.


thanks to everyone so far.

-Mathew



Mathew Anderson wrote:



Any other time (not during 5am to 8am) it runs great. Any ideas why a
user would be logged out during use?


What are you using for authentication?


LDAP




Is there a job that runs sometime between 5 and 8 that would be locking
your auth system and preventing authentication? Am I guessing wildly?
:-)


not that I could find.




What is your peak using for webmail activity? It's a long shot but
courier-imap could simply be refusing additinal logins from your webmail
server. Courier-imap limit the number of simultanious connections (to 4
by
default). This isn't usually an issue with webmail because the
connections
are so short.


peak usage is from 8am to 5pm Only one other person was attaching to
the
imap server during this time (the person left a mail client open and it
was checking for new mail every 5 mins). I did not see a disconnect for
that user.


look at MAXPERIP and MAXDAEMONS in /usr/lib/courier-imap/etc/imapd, turn
them up.  also make sure it's not tripping up on the daemons setting in
/usr/lib/courier-imap/etc/authdaemonrc although it shouldn't be.

you might also take a look at imapproxy as a way to lighten the load on
courier.






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