Dovecot 2.2.16: disappearing messages, mismatched summaries, duplicated messages, excessive full re-downloads

Sat Apr 18 14:38:02 UTC 2015

On 18 Apr 2015, at 16:00, David Gessel <gessel at blackrosetech.com> wrote:
> 
>> No. My best guess is that (your) ZFS+FreeBSD is simply not behaving the way Dovecot wants filesystems to behave (readdir() sometimes skipping over files). I don't have any other suggestion than trying a different filesystem or OS. I haven't heard ZFS having these problems before though.
> 
> 
> Or migrating to sdbox.  Absent any further suggestions, that will be my next step.  My commitment to Maildir is far lower than my commitment to FreeBSD/ZFS.  It is just a historical preference coming from a decade+ of courier IMAP. 

Actually as a workaround you could try maildir_very_dirty_syncs=yes which gets rid of most of the readdir()s.