The following is occurring consistently on users in only one vhost domain. Other vhost domains are not having the problem. The email client in use is the same (in both the working and non-working domains).
dovecot: Jan 29 21:19:18 Error: POP3(user1@mydomain.tld): mbox sync: UID inserted in the middle of mailbox /var/mail/vhosts/mydomain.tld/user1 (5629 > 5423, seq=2, idx_msgs=5) dovecot: Jan 29 21:19:18 Info: POP3(user1@mydomain.tld): Disconnected: Logged out top=0/0, retr=95/508506, del=95/95, size=506866 dovecot: Jan 29 21:19:52 Error: POP3(user2@mydomain.tld): mbox sync: UID inserted in the middle of mailbox /var/mail /vhosts/mydomain.tld/user2 (5634 > 5629, seq=2, idx_msgs=95) dovecot: Jan 29 21:19:52 Info: POP3(user2@mydomain.tld): Disconnected: Logged out top=0/0, retr=5/69654, del=5/5, si ze=69562
Once this message starts occurring, dovecot stops deleting retrieved messages when the user retrieves mail (with 'delete from server' set). The result is that the entire mailbox contents are fetched each time, resulting in copious amounts of duplicate messages.
I'm on the rc8 RPM that comes with FC5, but am willing to remove it and install a later Dovecot built from source.
Is this a known problem that can be fixed by upgrading?
If not, can someone tell me what this message means exactly, and how to gather more information for debugging? The MTA is Postfix.
Thanks