I'll just say what I'm sure someone else will shortly :) The problem is NFS: http://wiki2.dovecot.org/NFS The solution is 2.x Director: http://wiki2.dovecot.org/Director
Although it looks like you're currently on 1.x so it'd be a fairly significant upgrade for you. On Tue, Apr 3, 2012 at 3:24 PM, Müller Lukas <lukas.muel...@newmedia.ch>wrote: > Shortly after the mail gets delivered on server2, I get the following > errors on server1: > mail01 dovecot: IMAP(akzid...@triner.ch): fdatasync(/data/vmail/ > example.com/user/dovecot-uidlist) failed: Input/output error > mail01 dovecot: IMAP(akzid...@triner.ch): /data/vmail/ > example.com/user/dovecot-uidlist: next_uid was lowered (2143 -> 2142, > hdr=2142) > >