Send a non-html, one word subject line and one word message body from your Yahoo address to your Comcast address. Do the same from your Hotmail address. Do they arrive?
If you haven't already done so, check Comcast.net's FAQ on setting up an email account for Outlook 2003 here;
I hope this helps. Post back if you have any more problems.
I'm having serious problems sending and receiving emails. I'm running XP Pro on a 1 month old Dell 8400 and attempting to send and receive emails out of MS Word 2003 and Outlook 2003 through Comcast.net. The account settings are correct. Incoming server is mail.comcast.net and outgoing is smtp.comcast.net. I also have McAfee security as AV and FW, with the virus scan disabled for both incoming and outgoing emails. McAfee also has a Privacy Service and Spamkiller which I've had to totally disable because of the email problem. I can receive emails at my Yahoo address, and sometimes at my Hotmail address when sending out of Outlook/Word through Comcast, but when attempting to send the same emails to my Comcast address, they almost never arrive. This concerns me greatly because the lion's share of my business is done via email, and I'm totally in the dark as to whether the mail got to the address at the other end. My emails do contain links, attachments and references to credit card debt elimination among other financial terminology. does comcast have a high security filtering sytem or is there another way to remedy this situation. Customer emails are not arriving sometimes either. any assistance is greatly appreciated.