I have email accounts through my domain registrar (cheap-domainregistration.com) for a site I own.
As per the instructions on my domain registrar's site and after looking at http://wiki.dreamhost.com/index.php/MX_record, I entered:
I noticed that the periods at the end (which are stated as required in the wiki article) disappear when you go back to re-edit the fields.
Now when I check email (in Thunderbird version 188.8.131.52 (20061207) ) I get an error: "failed to connect to server mail.mysite.com"
Any ideas on how to fix this?