I have found with our server - which is configured as rifftrax.com - we can't send an email to "support@rifftrax.com" from there because the server is configured incorrectly. In our case we don't use the internally-configured mail system on the server, we are hosted internally with Exchange. So the only way for me to get the emails is to have it sent to another email address.

Try sending yours to another account and see if you get it there. If you do, then I would assume that your issue is something similar. Of course check junk on your mail server as well - I've had instances where the mail doesn't get past the server's internal spam guard (like SpamAssassin) and it never comes to my Outlook inbox for sorting.