Solved: Postfix with support for SSL - not TSL A remote user is trying to send mail using SSL and can't connect. TSL works fine. Adding the following didn't help: Code: smtpd_tls_protocols = SSLv1 SSLv2 SSLv3 TLSv1 Nothing in the logs except connection from unknown followed by lost connection. Any suggestions? Thanks for the help. Solution Found this answer at http://www.linuxquestions.org/questions/linux-server-73/postfix-tls-working-fine-but-ssl-over-port-25-not-working-710323/ Add the following to master.cf: Code: smtps inet n - - - - smtpd -o smtpd_tls_wrappermode=yes -o smtpd_sasl_auth_enable=yes -o smtpd_client_restrictions=permit_sasl_authenticated,reject -o milter_macro_daemon_name=ORIGINATING