The Return Path Blocklist (RPBL) is a list of IPs currently behaving in ways which represent a threat or abuse to the networks of our data and industry partners.
Examples of high-risk behavior include sending email campaigns from botnets, messages containing suspicious attachments, and email authentication failures or discrepancies.
The causes of these behaviors vary depending on the system but can include security issues such as viruses sending mail or customers sending spam or malware through your network.
If you have fixed problems on your network recently, or think this listing may be in error, please use the form below to request removal from the blocklist. You should be aware that while initial removal requests will result in your IP being removed from the current list, it does not indicate a permanent removal. New problems detected beyond this time will result in a new listing.