[Dovecot] convert to mdbox

Robert Schetterer rs at sys4.de
Tue Jul 23 10:44:11 EEST 2013

Am 23.07.2013 09:08, schrieb Birta Levente:
> Hi
> How can I convert all virtual mailboxes from maildir to mdbox? Manually,
> one by one, working, but I have a lot ...
> Virtual users and domains stored in sql database.
> Thats what I want:
> mail_location = maildir:/var/vmail/%d/%n/Maildir
> to
> mail_location = mdbox:/var/vmail/%d/%n/mdbox
> Thanks
> Levi


dsync should do it , but be aware from dsync bugs in some versions
do heavy testing before doing something live, for many users do i.e with
bash script

export your users from sql to a file, or use live query

for i in `cat user.lst`
dsync .....

for avoid acl and quota problems

dsync -o plugin/acl= -o plugin/quota= -u ....

perhaps look at


be aware of, if  use zlib plugin all backup mails get compressed too

Best Regards
MfG Robert Schetterer

[*] sys4 AG

http://sys4.de, +49 (89) 30 90 46 64
Franziskanerstraße 15, 81669 München

Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263
Vorstand: Patrick Ben Koetter, Axel von der Ohe, Marc Schiffbauer
Aufsichtsratsvorsitzender: Florian Kirstein

More information about the dovecot mailing list