If you have an account at Comcast email settings account and you want to configure your mail that your client’s send’s you. Then you can handle it through your own mail whether from your Microsoft Outlook, Mozilla, Thunderbird, email, etc. to send emails, you just have to enter Comcast’s SMTP and IMAP settings in its server configuration field. Here we know that there are outgoing mail server and incoming mail server. Where SMTP lies in the outgoing mail server and IMAP lies in the incoming mail server.