Hmm, That's funny that your ports are blocked atiyeh, I've run the server for years now on my SBC dsl connection.
Nothingman, Devioustrap, my email service is as reliable as my internet connection and power company. That is to say, its good enough for personal email, not good enough to sell accounts or anything like that. That being said, It hasn't been down more than 5 minutes over the past 2 years (except when I added ram, I guess.)
So the answer to my question is....... try it on Comcast and see what happens.
Cigar