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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