How can I get cox to stop blocking email from a friend in Kansas?

Here is an example of some of the types of information that a Cox webpage says it needs to be able to unblock.

• Domain
• IP/CIDR range of outgoing email servers
• From the following choices, indicate the item that best describes the issue you are experiencing.
  • My IP address is being blocked
  • My domain is being blocked
  • My email is being marked as spam
  • My email is not arriving to the intended recipients
  • My email is being delayed
  • Other
• Include a detailed description of the issue you are experiencing, such as the date and time when the problem began and the corrective action that has been taken.
• Include email server logs related to the issues.

Note: Due to the technical nature of the requested information, this email should be submitted by an email administrator or other technical contact that is familiar, and can obtain, all of the requested details.

Notice that the above Note suggests that because of the technical nature of the required information, and email administrator or other technician should obtain the details. I am not an email administrator nor is my friend. I am just a customer.