app-smtp: 0018331: Enable TLS on outbound connections
Migrated from: https://tracker.clearos.com/view.php?id=18331
Reported by: PBaldwin
Postfix should be configured to first try TLS on outbound connections.
Note: mail clients (e.g. Gmail) are starting to identify mail security levels. Example: https://support.google.com/mail/answer/6330403?authuser=1&visit_id=1-636492074680767468-759349263&p=tls&hl=en&rd=1 [^]