One more obvious line from the log: dovecot[26621]: auth: Error: LDAP: Connection lost to LDAP server, reconnecting Where it claims to reconnect, but after that there is no LDAP authentication. And the same configuration has worked fine since at least 10 years ago up to some recent update of dovecot or openldap. Best Dag
Dag Nygren via dovecot:> One more obvious line from the log: > > dovecot[26621]: auth: Error: LDAP: Connection lost to LDAP server, > reconnectingusually reconnecting works. If it doesn't for you, it's probably not dovecot's fault. I suggest to inspect openldap logs. Try to stop slapd and start (ideally: same environment and parameter) appending "-d 320". That "-d 320" prevent slapd becoming a daemon and flood stdout with logs. So it is really helpful if there are no other LDAP clients when you run slapd this way. You should see dovecot reconnecting and maybe a reason why that fail. Andreas