This is a guide to setting up secure SSL, TLS v1.2 email on your server to allow you to send and receive over encrypted channels using TLS v1.2
By default Hexamail automatically supports all cipher suites for schannel configured within Windows. Som eversions of Windows do not by default support TLS v1.2 You can find out more about Windows versions cipher suites here
First you need to check if your server already supports TLS v1.2. To do this use the command line openssl app available here
If it cannot connect check you have enabled SSL in your Hexamail Admin/SMTP Server/Network settings, and have installed and selected an appropriate certificate as per the guide to setting up ssl
If it does connect but does not show TLSv1.2 then you may need to enable TLS on your Windows server as per the following section
Windows 7 supports TLS 1.1 and TLS 1.2. However, these protocol versions are not enabled on Windows 7, Windows Server 2008 R2 by default. On Windows 8 and higher, these protocols are enabled by default.
To enable TLS 1.1. and TLS 1.2 on Windows 7, Import the following registry keys:
Next recheck your TLS setup:
References: http://support.microsoft.com/kb/245030