Any Comcast RBL/Email admins?

Tue Oct 16 18:52:58 UTC 2007

Hi,

Our two outbound mail gateways have been blacklisted by Comcast, and  
the normal form (http://www.comcastsupport.com/Forms/NET/ 
blockedprovider.asp) is returning a weird error.  See below.

Your request for IP block removal has been denied for the following
reason:
- You have been blocked from emailing the Comcast network because
we have determined that you are sending email from a
dynamic/residential IP within the Comcast domain. Comcast does not
allow subscribers to send email from a mail server other than
smtp.comcast.net. All mail should be sent through Comcast's mail
server. For information on configuring your machine to use
smtp.comcast.net, please follow the link below.
http://www.comcast.net/help/faq/index.jsp?faq=Email117481

Now, I'm pretty sure that our IP address block (147.9) is not part of  
Comcast, and we've been unable to get a hold of a person that can  
help explain this.  Any help would be most appreciated.

Thanks,

Michael Grinnell
Network Security Administrator
The American University