If you are not finding solutions or map.comcast.net is not responding then you need to check your
Comcast email settings iPhone. The settings on your iPhone might have changed. If so, you will need to update the settings. For example, if you are receiving emails from a different address, you will need to re-enable the settings. In the settings, you will find your username and password. This will help you identify the problem. If you change this and the problem persists, you will definitely need to contact customer service.