I have been setting up a new mail server and copied our client's old mail to it. The old server has Courier (under Plesk), we're using Dovecot on the new server.
Most accounts seem to work fine (under IMAP or POP3), but for a few we're getting the following in the
Error: Message ordering changed unexpectedly (msg #1: storage seq 140 -> 1) Fatal: Can't finish POP3 UIDL command
And the affected accounts can't get at their email. Things work ok if people switch to IMAP but for some of our clients that is a difficulty, so we really need POP3 working.
I used the Perl script given here to convert the mailboxes.
I've tried searching for these errors and all I get is referenced to Dovecot's source code, And I just don't know enough about POP3, UIDLs or Dovecot for that to help.
Thanks in advance for any help.