Login to your Comcast account and go to the “Email” tab. From there, click on the “Add an email address” link.
Enter the desired email address and password in the appropriate fields, then click on the “Add Account” button. Once your account has been added, click on the “Edit” link next to the newly added email address.
In the “Server Settings” section, change the incoming server type to IMAP and enter imap.comcast.net in the “Server Address” field. Leave the port number set to 993 and make sure SSL is enabled.
For the outgoing server settings, change the server type to SMTP and enter smtp.comcast.net in the server address field. Again, leave the port number at 465 and enable SSL encryption.
Click on the “Save Changes” button when you’re finished and you’re all set! You can now access your Comcast email from any IMAP-compatible email client or service