by Code Crafters » Fri Sep 04, 2015 8:52 am
HGVS is right that we've disabled SSL v2/3 support for listening services (SMTP, POP3, IMAP4, WebMail, Remote Admin) and have introduced a general setting to pick TLS v1.0, v1.1 or v1.2.
Picking a newer TLS version is more secure but also less compatible with older mail clients which is why we've up to now left TLS v1.0 as default.
If you feel that a TLS version setting per service would be useful then we can always keep a general setting default and introduce optional overrides for each service. Obviously mail clients using SMTP, POP3 and IMAP4 will only support the same versions for all 3 services but web browser based services (Webmail and Remote Admin) may benefit from being a different TLS version.