Hello !

I'm setting up an email server on debian etch using Postfix, Maildrop and Courier-Imap with virtual user in a mysql database. It works fine but I have a problem with thunderbird clients.

When there is a new mail in INBOX it blinks like if it was constantly arriving, consequently the the imapd process consume an abnormal amount of resources and thunderbird is barely usable.

I set IMAP_ENHANCEDIDLE=1 in /etc/courier/imapd (i.e. imap server inform instantly the client when a new mail arrive, no checks every x minutes) but it can't explain the problem; if set to 0 the problem is still there, and with evolution mail client I do not experience such problem (either MAP_ENHANCEDIDLE=1 or =0). I also tried to lower "Maximum number of server connections to cache" to 2 in thunderbird (http://kb.mozillazine.org/IMAP:_advanced_account_configuration), I still experience the problem.

I wonder if the problem comes from thunderbird or courier-imap. I tried thunderbird windows (2.0) and linux (1.5)

Any idea to solve that?

Thank you.