Thank you for chiming in!
This looks a big issue! I need more information from your log files to understand what happened.
I guess dovecot was installed automatically
Please @oliver, @ohifra: attach the output of
yum history pkg-info dovecot
grep NsReleaseLock /var/log/messages
Please share your workaround!
I guess we can edit /etc/dovecot.conf and remove “antispam” from the `mail_plugins" line