See:https://portal.chicagonettech.com/kb/a54/configure-ssl-tls-to-secure-smartermail.aspx.
That should help you. Msje certain you follow the instructions exactly.
If you want TLS 1.2, you'll have to install the latest version of 14.2.
Bruce Barnes
ChicagoNetTech Inc
brucecnt@comcast.net
Phonr: (773) 491-9019
Phone: (224) 444-0169
E-Mail and DNS Security Specialist
Network Security Specialist
Customer Service Portal: https://portal.chicagonettech.com
Website: https://www.ChicagoNetTech.com
Security Blog: http://networkbastion.blogspot.com/
Web and E-Mail Hosting, E-Mail Security and Consulting