So, I did a stupid thing! I upgraded my Thunderbird email software because the version I was using was no longer going to be supported. Now that I have the new version, I can send mail fine. When I logged onto Bell's site for find out why I couldn't receive, I discovered that Bell does not support Thunderbird. Thunderbird is one of the more robust and stable email packages out there and a major ISP has chosen not to support it. Perhaps it is time to change ISPs.