@Todd, I somehow had missed you were already using the smtpd_sasl_tls_security_options config, sorry about that. I don't understand why telnet didn't display the 220 banner as the logs suggest it was sent:
Aug 17 04:07:21 kangaroo postfix/smtpd[46495]: > kangaroo.unclet.net[127.0.0.1]: 220 kangaroo.unclet.net ESMTP Postfix (Ubuntu) I doubt it will make a difference but maybe try with `nc -v 127.0.0.1 25` instead? If would be nice if you could provide the output of `sudo ss -nltp`. Also, if you don't mind, please attach the main.cf and master.cf files so I can use them to reproduce here. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1940603 Title: postfix/smtpd: fatal: no SASL authentication To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/postfix/+bug/1940603/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
