[Dovecot] dsync error: "Mailboxes don't have unique GUIDs"

Charles Marcus CMarcus at Media-Brokers.com
Sat Jun 23 13:29:26 EEST 2012

On 2012-06-22 5:24 PM, Jeff Gustafson <ncjeffgus at zimage.com> wrote:
> I'm getting an error backing up mailboxes. I'm using the mirror
> command:
> dsync -fvo mail_home=/home/users/bob mirror ssh vmail at dsync -o
> mail_home=/home/.incoming_mail_migrations/users/bob


> # 2.0.13: /etc/dovecot/dovecot.conf

As you are aware (since you participated in the thread discussion about 
this months ago), Timo is working on a total rewrite of dsync, and if 
memory serves, it is mainly for 2.1+, and it is not recommend to use it 
in earlier versions if you need reliability (ie, 2.0.x, as you are using)...

So, by all means, update and help timo make it better!

Timo? Care to elaborate on where you are with this, and how much of the 
rewrite is being applied to 2.1 (all of it?), or backported to earlier 


Best regards,


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