Hi List, As you know AstLinux's mail forwarder supports both TLS/STARTTLS (TCP 587) and SSL/SMTP (TCP 465).
I ran across a very well written article that is worth sharing: SSL vs TLS vs STARTTLS https://www.fastmail.com/help/technical/ssltlsstarttls.html The current best practice is to use SMTP "implicit TLS" over port 465: https://tools.ietf.org/html/rfc8314#section-3 This seems like good advice since STARTTLS starts as cleartext and things can go wrong. Unfortunately, some email clients hide the STARTTLS option and don't automatically disable STARTTLS when port 465 is chosen, Mail in iOS 12 is one such example. At least with AstLinux, choosing "SSL/SMTP" (no STARTTLS) and port 465 works, and the current best practice. Lonnie _______________________________________________ Astlinux-users mailing list Astlinux-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/astlinux-users Donations to support AstLinux are graciously accepted via PayPal to pay...@krisk.org.
