dsync duplicating identical messages

[Timo Sirainen]

On 16 Oct 2014, at 08:43, Bruno Viaris <bviaris at lescentaures.fr> wrote:

> I’m trying to setup dovecot/postfix/getmail for a single user
> application: I have 3 email accounts and 2 main computers (home and
> work). I want to have an imap server on each machine with
> sync/replication so that read/reply/delete status and sorting into
> folders are identical. This part is achieved via dsync and seems to work.
> 
> Messages are fetched from my ISPs with getmail on both machines. The
> problem I have is that dsync does not see that a message already fetched
> on both sides is identical, and duplicates it.

dsync isn't supposed to work with this kind of setup. It doesn't try to compare if message contents are identical. It works with GUIDs that Dovecot generates internally when writing the mails to disk.

> If you explain me that there is no way to prevent this duplication and
> that anyway dsync does the right thing, I will probably use getmail only
> on one machine and let dsync propagate the messages to the other site,
> but I will miss the redundancy (and some speed) of my wished setup...

I think that's how it needs to be done.