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Beginner

Blocked IP

I have a client that emails the State of Wisconsin often. Recently their email server IP has been blocked.

The State IT dept advised me to contact Cisco to remedy the problem. Cisco support wanted the device type, serial number etc of the device the State uses. Of course I do not have that information.

I can change the IP of my clients email server, and go through all the DNS changes, but my fear is that the problem will return.

Is there anyway to find out why their Email server has a bad rep, and is there a way to remedy the problem without going thru the IP address and related changes?

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