Frequently asked questions

Keyword:

Which TLS versions are supported for email?

We support TLS 1.2 and 1.3.

If your software does not support TLS 1.2 (see below) with PFS ("perfect forward secrecy"), you must either upgrade, use our webmail, or (not recommended) disable encryption (SSL, TLS, STARTTLS) in your email software so that everything is sent as clear text. We recommend upgrading.

NOTE: TLS 1.2 was introduced in 2008. Software/equipment which does not support TLS 1.2 has, to a great extent, very severe security vulnerabilities and should not be used online.

Overview of software supporting TLS 1.2 and newer

Apple Mail: 10 and newer (Sierra)
Outlook for Mac: 2016 and newer
Outlook for Windows: 2013 and newer
Thunderbird: 31 and newer
OpenSSL based software as of 1.0.1
MacOS: Sierra (10.12) and newer
Windows: 8 and newer

Overview of software that DOES NOT support TLS 1.2 and newer

Apple Mail: 9.3 and older
Eudora
Microsoft Entourage
Outlook for Mac: 2012 and older
Outlook for Windows: 2010 and older
Thunderbird 27 and older
Windows Live Mail
OpenSSL based software older than 1.0.1
Android: 4 and older
iOS: 4 and older
MacOS: El Capitan (10.11) and older
Windows: 7 and older (may be configured manually for Windows 7)