No SASL authentication mechanisms using Ubuntu 20.04 + ISPConfig 3 + Dovecot
I followed step by step the guide "The Perfect Server - Ubuntu 12.04 LTS (Apache2, BIND, Dovecot, ISPConfig 3)" to setup a new server. I works fine but I have problems with email.
The Monitor says:
The Mail log says a lot of times:
Feb 15 08:20:11 ubuntu postfix/smtpd: fatal: no SASL authentication mechanisms
Searched for other posts in the forum and I have no solution yet. Anyone can help me?