Are You Blocklisted?

Your email may not be reaching subscribers’ inboxes. 

Validity offers a free Blocklist Lookup tool informing you if your IP address is on our email blocklist. To check your IP address right now, fill out the form to the right.

The Return Path Blocklist (RPBL) from Validity collects a number of email server IP addresses engaging in spam-like behavior and unsafe email practices. This blocklist is based on Validity’s robust data sources and cooperative industry partnerships, and is widely used by mailbox providers, security vendors, and filtering agencies as a contributing factor in their filtering algorithms and policies. 

The RPBL Blocklist identifies spam-like sending practices and classifies emails based on specific criteria. These calculations are centered around sender behavior and content such as threatening attachments, spam trap hits, and authentication failures. An IP is listed when our system detects messages containing these indicators from that IP.  

The RPBL is just one of hundreds of blocklists out there and they are not all created equal. Some blocklists can have a catastrophic impact on your email program, while with others, you will hardly notice any impact. If you find yourself on the RPBL, it is a good indication you’re on other blocklists as well, and you’re likely experiencing underlying issues with your email program. Being able to proactively monitor listings, identify the cause, and understand the methods to resolve it are vital to managing the situation effectively.  

Contact us to learn more about how Validity can help.

Step 1: Enter Your IP Address

Step 2: Enter Your Information

Note: this free tool only checks for active blocklistings.

The Sender Score Guide to Deliverability

See what factors contribute to your sender reputation and how it directly impacts deliverability and overall email performance.

Download the Guide

Featured Resources

Report: Fundamentals of Email Marketing

This guide lays out the foundation of email marketing, giving you the insight you need to understand how email marketing works.


Webinar: State of Email Live

Join us every month as we discuss email in today’s changing world. Each show, we'll share current metrics updates and changes as well as host guests from the industry.


Case Study: Hickory Farms

Learn how this gourmet food retailer achieved a near 100% inbox placement rate and drove significant growth in revenue for their highly seasonal business.


We Know Email

We’re the experts in deliverability and driving results for your email marketing.
Let’s chat and find out how you can improve your email deliverability.

Request a Demo