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About Proofpoint


We aren't blacklisted anywhere else, why are you blocking us?

  • CSI is not a blacklist; it is an IP reputation system, based on data such as user feedback from the Cloudmark community, email sent to spamtraps, heuristics regarding reverse DNS and nearby IP addresses, and other factors, which is used by our customers to assist them in making policy decisions on how they handle inbound mail. Some customers, depending on the reputation of your IP, may choose to reject your mail. You can complete the IP statistics reset request form if you believe that your reputation is incorrect.


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