Re: TLS version information

On 26.08.2022 23:27, Mark Neidorff wrote:

I'm running Leap 15.4 using KDE and KMail for my email (old habits are hard to break). I received and verified a notice from my ISP that they will be requiring TLS 1.3 (but will accept 1.2) starting September 1. How do I determine what version of TLS is in use on my system, and if it is not an acceptable one, how do I upgrade it?

There are several libraries implementing SSL/TLS and it depends on what library KMail is using. OpenSSL and GnuTLS (two most common) support TLS 1.3 since a long time. It seems that kmail binary loads both OpenSSL and GnuTLS libraries so I assume it is using one of those (do not know how to selects specific implementation).