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Proofpoint, Inc.

Proofpoint IP address blocklisted by UCEProtect or Backscatter

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Situation Outbound emails from customers are being rejected or bounced with a message showing one of our dispatch IP addresses as being blocklisted. 
Solution Communicate with customer's recipient to avoid using backscatter and UCEprotect as a blocklist service or IP check. They are not blocklist engines.


Proofpoint's official position

UCEProtect and Backscatterer.org are owned by the same organization. UCEProtect and Backscatterer will list IPs that send spam and/or send backscatter (misdirected bounces). Both of these blocklists are considered extreme in that their listing policies are aggressive enough that we typically see very little actual impact to email flow.

UCEProtect is a public DNSBL that lists IPs that send spam to their spam traps. UCEProtect also charges a delisting fee which Proofpoint will not pay and does not recommend paying for list removal.

Backscatterer.org lists IPs that send backscatter spam (misdirected bounces).  Backscatterer.org also charges a delisting fee which Proofpoint will not pay and does not recommend paying for delisting.  Additionally, in our experience, we typically see very little actual impact to email flow due to Backsatterer.org's aggressive listing policies.

Proofpoint will not pay and does not recommend paying for list removal.