I'm having problems receiving incoming emails as of yesterday through my custom domain email (originally through the Small Business Live setup) . Outgoing email is fine. I log on through hotmail.com and it takes my custom email and I can see all my emails and email box but the incoming ones stop as of yesterday at 4:13pm PST. This is my business email so its pretty important to get it up and running. I've had a few people tell me that there email bounced back. I tested it and the bounced back message reads:

This message was created automatically by mail delivery software.
A message that you sent could not be delivered to one or more of
its recipients. The following addresses failed:
  <*** Email address is removed for privacy ***>
domain name system error:
domain bayareagroups.com:
domain not found

I have tried all the Options/Filtering/Safe Senders/Etc.  fixes offered on the forum. Doesn't make sense because I will receive an occasional junk email in my junk email folder. Please Help!