How do i scan to comcast email - PhotoSmart HP Office Equipment & Supplies

If you want help regarding any type of issue in Comcast email then i would recommend you to take help from Xfinity email support team.
visit: https://www.xfinity.com/support/articles/ways-to-get-help
Comcast Email Customer Services 1 888 211 0387 Technical Support

I am assuming you want to scan form your AiO to email if not please be more specific in your question.
That being said if your are a Comcast customer and the AiO is on the network you need to configure the device to get to the Comcast SMTP server at "smtp.comcast.net" port 587. SSL checked.
if that doesn't get through you might need to provide login credentials. this would be your email address and password.

this link will give you Comcast email server and configuration info

Using Email Client Programs with Comcast Email

you will also need to have something in the subject line of the email or it will be rejected