[Users] TLSv1.3 support

[Brian Morrison]

On Thu, 27 Jun 2019 06:11:47 -0400
Jerry <jerry at seibercom.net> wrote:

> claws-mail version 3.17.3 for Windows
> Windows 10 Pro version 1903
> 
> Does claws-mail support 'TLSv1.3'? When sending mail, it only uses
> 'TLSv1.2'. I am using claws-mail to send mail to my MTA, 'postfix',
> that does utilize 'TLSv1.3'.


The Win32 port of Claws Mail uses gnutls as its SSL library, and
according to my quick look gnutls has supported TLS 1.3 since version
3.6.5, or to be more precise it has been enabled by default since that
version.

I don't know for sure the gnutls version in CM for Win32, but it may be
in the ML archives or you may get a reply from Andrej Kacian to confirm
what happens during the transactions to your MTA and whether gnutls
will automatically use TLS 1.3 if the server advertises it.

Readers may find the following blog post useful:

https://nikmav.blogspot.com/2018/05/gnutls-and-tls-13.html

-- 

Brian