Outlook and UW-IMAP
Unfortunately there are other people having the same problem and I'm in this group too.
I receive exactly same error while I'm trying to connect from Outlook 2003 to newly installed UW-IMAP server.
UW IMAP-2006k - used with SSL
I use Postfix as MTA
Outlook 2003 - configured to work with IMAP - turned off option "Get folder unread count"
Some users (not everyone) are getting error while checking mail:
"...your imap server has closed connection" or other errors saying - can't connect to imap server - even if 10 minutes before everything worked fine. I recognized there are many imapd processes on a server belonging to the same users - sometimes 4 or 5.
The reason why I use UW-IMAP is historical. A week ago I moved from Linux RH 7.3 with IMAP and Sendmail. Changing MTA was not that big problem, but unfortunately IMAP seems to be different. On old server I havent had any problems with IMAP and this is why I am convinced it is possible to solve it out somehow. Unfortunately I still didn't find the way?
I use "/home/mail/username" mailboxes - I guess UNIX mailbox format and the same configuration was on old server.
Maybe there is already somebody who went through all these things.