On 3.2.2014, at 17.19, Gedalya <[email protected]> wrote: > I think I'm having a problem with simultaneous pop3 connections on the same > mailbox with one connection deleting a message. .. > Jan 29 14:36:33 imap1 dovecot: pop3([email protected]): Error: Message ordering > changed unexpectedly (msg #1: storage seq 1 -> 2) > Jan 29 14:36:33 imap1 dovecot: pop3([email protected]): Disconnected: POP3 > UIDLs couldn't be listed top=3/2662, retr=0/0, del=0/1227, size=51548362 > > Running Dovecot 2.2.10+hg-6018854c8c91 > Mailboxes were migrated recently using dsync with pop3 migration plugin.
What mailbox format is this with? I can only reproduce this by forcibly making sure that pop3.order field doesn't go into dovecot.index.cache field. Anyway .. this should help: http://hg.dovecot.org/dovecot-2.2/rev/59decc957b39 So also add something like "uidls=%u" to your pop3_logout_format. This will use up a little bit more memory by storing all the UIDLs in memory. The %u output can sometimes be used to debug why POP3 clients are redownloading messages.
