On Mon, 2009-09-28 at 14:31 +0100, S. A. Woltering wrote:
The problems we see are sporadic thunderbird error messages of the kind "cannot save message to Sent folder" and for some users with large-ish numbers of mail folders one or two of their folders are appearing empty.
Hmm. So .. Do you see anything different in log files around that time? For example:
imap-login: Info: Maximum number of connections from user+IP exceeded (mail_max_userip_connections): user=<tss>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, secured
or:
dovecot: Error: Maximum number of mail processes exceeded (see max_mail_processes setting)
or anything else with "Error:" or "Fatal:" prefix?
log_path: /var/adm/dovecot.log info_log_path: /var/adm/dovecot.log
I'd put these to different files. It's then easy to see if there have been any errors, because only errors will be written to log_path.