I am confuse about which domain to buy for SSL certificate for our company email server.
Currently, we have a website http://www.companydomain.com and got a SSL Cert for https://secure.companynam.com. Our email server domain are http://webmail.companydomain.com and mail.companydomain.com for POP/SMTP.
So in order to setup a SSL for our email server, what is the (sub-)domain that I should buy? Thanks alots for your time. Johnny Le