How can I file a request for reverse DNS for my comcast bussiness mail server

How can I file a request for reverse DNS for my comcast bussiness mail server?

For help with a Comcast Business account, see https://forums.businesshelp.comcast.com/.

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@user_d8cfaf  We can take care of this for you.

Please send us a Direct Message with your full name, business name, full address, and phone number. • Click "Sign In" if necessary 
• Click the "Direct Messaging" icon in the top right corner
• Click the "New message" (pencil and paper) icon 
• The "To:" line prompts you to "Type the name of a person". Instead, type "Comcast Business" there 
• - As you are typing a drop-down list appears. Select "Comcast Business" from that list 
• - An "Comcast Business" graphic replaces the "To:" line 
• Type your message in the text area near the bottom of the window 
• Press Enter to send it
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I have added one of my charter/spectrum email addresses to my Outlook client. I cannot use that email address to send from. I get an error message that indicates that a reverse DNS entry does not exist for the IP address I am sending from.  I used www.debouncer.com to do a reverse DNS check and verified that the IP address I am assigned by comcast does not have a reverse DNS. How do I get one assigned? I do not have a business account; do I need one? I can log onto the spectrum/charter site and send email from there.