Xfinity/Comcast Email Settings for DNS & SMTP.

I have a Wordpress website with a Contact Form so I can accept messages. The messages should go to my comcast email. I set up WP SMTP (plugin) to help the Contact Form messages go to my email. Of course, there doesn't seem to be a lot of guides on specifically setting up an SMTP plugin with a Comcast email. The messages are going into my Spam Folder and the Autoresponder that is supposed to get sent isn't getting sent. The problems could also be with my Domain's DNS Settings. Any further help would be appreciated.