I have installed the dovecot 1.0 beta3 (package included with Ubuntu Dapper Drake) and everything is working very well. Next I wanted to try the dovecot lda (for sieve filtering).
In postfix I have "mailbox_command = /usr/lib/dovecot/deliver" and I followed the instructions from http://wiki.dovecot.org/LDA. I only changed "postmaster_address = postmaster@localdomain.local" and "user = dovecot" from the example configuration.
With this configuration, no mail is delivered (discarded?) and in the logfile there is this error:
Jun 5 18:10:08 localhost postfix/local[9630]: BFA6D5A403: to=<jef@localdomain.local>, relay=local, delay=0, status=bounced (local configuration error. Command output: Fatal: open(/etc/dovecot/dovecot.conf) failed: Permission denied )
Changing permissions on /etc/dovecot/dovecot.conf to 644 fixes the problem, but I think this is not the best solution. Any ideas?