TLS SNI Client Support

Works:

• Thunderbird (Linux)

• K-9 on Android (merged Sept 2015 - https://github.com/k9mail/k-9/pull/718)

• Apple Mail (according to https://forums.cpanel.net/threads/mail-ssl-sni.454592/ )

• Mutt (according to https://gitlab.com/muttmua/mutt/-/blob/master/README.SSL )

• NeoMutt (since 2016-03-07 according to https://www.neomutt.org/feature/tls-sni)

Doesn’t work:

• K-9 on Droid X2 (maybe fixed in newer versions - see above)

• Apple Mail (Mac OS X 10.10 and lower AND iOS 9.3 and lower)

• Outlook for Mac version 15 (according to https://forums.cpanel.net/threads/mail-ssl-sni.454592/ )

• Kindle Fire HD 8

• Outlook 2013