Your friend in the digital age
Skip To Menu
Skip To Content
You are here: Messaging Postmaster > Contact Us

Cox Troubleshooting and Support:

1.Enter your error code or search term in the box below.

2.See the Knowledge Base.

3.Contact Cox for additional help.

Why am I being blocked?

The error message that was displayed at the time of the block contains information regarding the reason. . More details about the various error messages can be found in the Error Codes section.

Can I get unblocked?

This depends on the reason for the block. The details of the error you encountered are found in the Error Codes section, which contains information on how to request a block be lifted.

Can I be whitelisted?

Protection of our customers and network is paramount. Therefore, we do not whitelist.

Does Cox offer a Feedback Loop?

Yes. See the Feedback Loop section here.

What are Cox's sending limits?

Cox currently allows up to 5 simultaneous connections per sending IP address, and up to 100 messages per connection. However, regardless of these limits, Cox may throttle your sending ability based on your sender reputation. Cox's sending limits and policies are subject to change at any time. Cox will update this website when changes are made.

How do I report abuse?

Please find instructions on how to report abuse here.

Enter labels to add to this page:
Please wait 
Looking for a label? Just start typing.