PTR Record Request

https://www.xfinity.com/Corporate/Customers/Policies/HighSpeedInternetAUP / Prohibited Uses and Activities / Technical restrictions says residential customers may not:

... use or run dedicated, stand-alone equipment or servers from the Premises that provide network content or any other services to anyone outside of your Premises local area network ... Examples of prohibited equipment and servers include, but are not limited to, email, web hosting, file sharing, and proxy services and servers;

This is a private email system for testing and family members only. It is not offered to anyone outside of my LAN.

Again, I am taking software development and programming classes and setting up a test email server for my family is a training exercise. But the server won't work without a PTR Record. Xfinity, please respond. Thank you.

So if it’s only to be used on your home lan, you can install a dns server on your pc, such as Bind, You can configure all that, plus it will be a good learning experience, or install virtualbox, install Linux within it, install Bind, all are Free, of course you would configure internal ips