Outlook 2002 with Comcast Cable Internet

[DCE]

I'm a new Comcast cable internet customer. I can't get my email using
Outlook 2002. I can send and receive my email via the Comcast website.

I receive the following Outlook error messages when I test or send/receive
with both my new Comcast and old AT&T email accounts:

- "Send test e-mail message: The specified server was found, but there was
no response from the server."

- "Task 'postoffice.worldnet.att.net - Sending and Receiving' reported error
(0x800CCC0F): The connection to the server was interrupted..."

Here's some more info:

- I double-checked my Outlook settings for Comcast email. They seem
correct. I'm using mail.comcast.net (incoming) and smtp.comcast.net
(outgoing).
- I tried connecting via Comcast cable internet connection to my old (but
still active) AT&T email account via Outlook. No luck. Same error messages.
- I temporarily disabled my Comcast cable internet connection and used my
old AT&T dial-up connection. Then I attempted to get my AT&T email via
Outlook. It worked correctly.

Thanks for any help that you can offer. Regards.