@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:
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.
@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.