Date: 2024apr23 Keywords: RFC2476, RFC4409, Postfix, submission, MSA Q. Postfix: no AUTH from EHLO The Postfix instructions for a Submission server say to check that "AUTH" is received with you telnet in a do EHLO but I am not getting it. A. This happened to me when I had temporally disabled TLS but still wanted AUTH (with dovecot SASL). The cause was this option in main.cf

/etc/postfix/main.cf smtpd_tls_auth_only = yes # Causes no AUTH when you telnet in and don't use TLS

When I changed it:

/etc/postfix/main.cf smtpd_tls_auth_only = no # Gives AUTH when you telnet in and don't use TLS

I got AUTH when I telneted in.