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Comcast emails don't work
Another reason why Comcast emails don't work is that you're using the wrong password or incorrect email address. You can try changing your password, or trying to disable third-party apps. Sometimes, deleting the wrong application or uninstalling it will solve your problem. If the problem still persists, follow the next step. If you have a smartphone, you can try changing the application on your phone to work better.
See also - https://emailspedia.com/cannot-send-receive-emails-with-comcast/
See also - https://emailspedia.com/cannot-send-receive-emails-with-comcast/