Hi
It seems that after last night update, there is an error preventing dovecot from (re)starting.
doveconf: Fatal: Error in configuration file /etc/dovecot/conf.d/90-sieve.conf line 231: Unknown setting: sieve_vacation_send_from_recipient
sieve_vacation_send_from_recipient was mentioned twice in that file, the one in the protocol imap{} block shouldn’t be there. I commented that line and dovecot could be started again.
True, I had custom changes in that file. As a precaution I moved those to a new file.
Still, for only a little effort extra you PR can take into account a modified file.
Thank you for your PR.