This issue can be fixed with easier steps and you can easily get back your email in working conditions. First to fix the you need to check your network connection and make sure the internet is in working condition. Then check the Comcast email server settings. There might be an issue arising due to misconfigured IMAP or SMTP settings which you can easily alter in the settings or simply set everything back to default. This process will probably help you out and your issue will be easily solved.