I purchased a cheapy ($10/yr) Comodo Positive SSL cert to secure www.mydomain.com. This cert covers the root, mydomain.com, as well. I have a few mail related questions: 1) Can I re-use the SSL cert to secure SMTP traffic? I seem to recall doing so a long time back for a sports league I helped out with. 2) If yes, should I/can I configure the mail system to report it's name as mydomain.com or www.mydomain.com when negotiating connections? 3) Does the RDNS for the IP address which will be handling SMTP connections need to match the hostname value used above? Thanks for reading (and, hopefully, answering)!