I thought my postfix setup was configured to send mail on port 587 and receive mail on port 25, so I was surprised to find that I could send mail from the local machine on port 25. Is my config OK?
master.cf: smtp inet n - n - 1 postscreen smtpd pass - - n - - smtpd tlsproxy unix - - n - 0 tlsproxy submission inet n - n - - smtpd -o smtpd_sasl_auth_enable=yes -o smtpd_recipient_restrictions=permit_mynetworks,reject_plaintext_session,permit_sasl_authenticated,reject main.cf: mynetworks_style = host smtpd_recipient_restrictions = reject_unauth_destination, permit smtpd_relay_restrictions = smtpd_tls_security_level = may smtpd_tls_auth_only = yes - Grant