I was just on the phone with an extremely helpful Comcast person. It seems that Comcast is aware that there is some sort of bug that they are working on to fix. It applies not only to Outlook but also some other email programs. It may take up to 24 hours to repair but he said I would be notified when they believe they have fixed the problem.
Unfortunately I do not remember his name, but I will repeat, he was extremely helpful and spent time trying to find out what is going on. He also said that Comcast is aware of all the problems people are having with sending out emails.
So hang in there
... View more