Are You Blacklisted?

Check if your IP address is on the blacklist. Enter your email server IP address and find out.

Blacklist Lookup

Return Path hosts an official list of email server IP addresses that show activity that resembles spammers. This blacklist is widely used and based on real time data from Return Path’s cooperative Global Reputation Network.

The Global Reputation Network blacklist calculates the probability that emails from a particular IP address may be spam based on measurements of unwantedness. This calculation is based on the percentage of email messages from an IP address that are considered spam by individual recipients, mailbox providers, and filters through actions such as complaints, unusual volume patterns, emails sent to spam traps, and emails sent to unknown users.

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