It appears that Hotmail and MSN has "Blocked" Comcast email accounts. So if you are not receiving your email form your Comcast Friends you now know why.
<hr>Your message did not reach some or all of the intended recipients.
Subject: Hotmail and MSN blocking Comcast
Sent: 11/30/2005 5:46 PM
The following recipient(s) could not be reached:
??? ??? on 11/30/2005 5:46 PM
550 permit denied<hr>
Also those of you of using Hotmail and MSN could contact them (Hotmail and/or MSN) and complain.