Proofpoint IP Lookups: Is my IP address blocked?
How to Check if Your IP Address is Listed
If you believe that an email-sending IP address that you use is listed by a Proofpoint service, you can use the following resources to check the status of your IP address and learn how to prevent your IP address from being blocked.
Proofpoint Dynamic Reputation IP Lookup
If you believe that the Proofpoint Dynamic Reputation email reputation system is blocking delivery of email from your organization, please visit:
Use the form on that page to see if your IP address is currently blocked and learn how you can submit more information on your IP to Proofpoint.
SORBS DNSBL Lookup
If you believe that the SORBS (Spam and Open Relay Blocking System) DNSBL is blocking delivery of email from your organization, please visit the SORBS website:
There, you will find information on getting support, checking if your IP address is listed by SORBS and information about de-listing blocked IPs.
The free SORBS service is operated by an independent subsidiary of Proofpoint. All support and inquiry services related to SORBS must be submitted through the SORBS site.