I am trying to backup all my mailboxes to another computer. I am using the following command:
dsync backup -u '\*@\*' remote:email@example.com
The problem is that I have lots of mail accounts that only do a redirect using sieve, for example
firstname.lastname@example.org. In case of these mailboxes the
.dovecot.sieve file is not backed up. As soon as I allow one mail to be saved (by temporarily changing the discard; to keep; in the sieve script)
.dovecot.sieve is also backed up at the next dsync run.
This is Dovecot 2.2.9 on Ubuntu 14.04.5 LTS but the backup computer runs Ubuntu 16.01.1 LTS with Dovecot 2.2.22.