My bad: It does not work with the current dovecot 2.3.10 from the official repos, either. Thus, it is an upstream bug.
I have found how to solve the problem: mail_location = mbox:/home/%u/mail/:INBOX=/home/%u/mail/mbox:INDEX=MEMORY mail_plugins = snarf notify zlib namespace Snarf { prefix = ~~Snarfbox/ separator = / location = mbox:/run/dovecot/empty:INBOX=/var/mail/%u:INDEX=MEMORY list = no hidden = yes } plugin { mbox_snarf = /home/%u/mail/mbox snarf = ~~Snarfbox/INBOX } -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1872550 Title: dovecot snarfing does not work on 20.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dovecot/+bug/1872550/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs