Question wrt. dovecot replicator

Jan Behrend jbehrend at
Fri Oct 10 12:45:43 UTC 2014

On Fri, 2014-10-03 at 23:37 +0200, Remko Lodder wrote:
> >>> How can I determine why there are duplicated emails?

Same problem here!

> >>> What kind of messages should I specifically look for?
> >> Look for any errors and warnings in the Dovecot log. You could also enable mail_debug (ref.

> >>> Can I set this up for a few selected accounts instead of all accounts like it was currently? To make sure I do not make things worse for others then needs to be :-)
> >>> The service had been disabled for the time being to prevent the other users from getting duplicated emails.
> >> I do not know what kind of userdb you are running, but there is a newish patch that enables per user replication via the
> >> mail_replica setting. It is not yet included in the newest (2.2.13) release of Dovecot, but is available via the enterprise
> >> version. There are no FreeBSD builds for that, though. ref:
> > 
> > my userdb consists of local users (Which are fed through LDAP at the backend). perhaps I can setup a mailAttributes setting or something so that the replica can be
> > set, although I prefer that I have control over that in the config itself :-)

With the latest Debian jessie version 1:2.2.13-5 you can actually have a
per user mail_replica setting taken from a (LDAP) directory.  This keeps
the duplicate mail issue away from other users but a few willing to
test ...

> For what it’s worth:
> replication_dsync_parameters = -f -d -N -l 30 -U

I read in Peer Heinlein's Dovecot book
that replicating a public namespace gives you trouble :-(. So keep the
"-N" option away for now.

However I would like examples for the "-n" and "-x" options, which are
neither given in the wiki nor in the nonexistant man page.

I think the replication feature is very, very cool, but right now it
gives me a hard time to implement flawlessly ;-)

Thanks for any help or light shed on this issue ...

Cheers Jan

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Jan Behrend - Rechenzentrum
Auf dem Huegel 69, D-53121 Bonn                                  
Tel: +49 (228) 525 359, Fax: +49 (228) 525 229
jbehrend at

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