Free Email Blacklist Checker
Find out if your emails are actually reaching the audience's inboxes. Enter any email address to check if it's on any major blacklists, the hidden reason why your messages might be disappearing into thin air.
See If Your Emails Are Being Blocked
Email blacklisting is one of the most common yet overlooked causes of delivery failures. When an email address's associated domain or sending IP appears on a blacklist, your messages may never reach their destination. Our free Email Blacklist Checker solves this by analyzing the complete email infrastructure behind any address.
How Email Blacklist Checker Works
Unlike simple domain checkers, Unspam’s Email Blacklist Checker performs comprehensive analysis across multiple layers of your email infrastructure. First, we extract and verify the domain from the email address you provide. Then we query DNS records to identify the actual mail servers configured to handle email for that domain. Finally, we resolve those mail servers to their underlying IP addresses, which carry their own distinct reputation scores.
How Does Unspam Email Spam Checker Work?
How Email Reputation Affects Your Business Communication
Every email address operates within a complex delivery ecosystem involving domains, mail servers, IP addresses, and authentication records. When any component of this system gets blacklisted, the entire email address becomes unreliable for communication. The sender may have no idea their messages aren't arriving, while recipients never receive critical business correspondence. This silent failure mode makes blacklist monitoring critical for anyone who depends on email for business operations.
Real-Time Scanning
Our email blacklist lookup tool queries 40+ actively maintained blacklist databases in real-time, focusing on the lists that email providers actually consult when making filtering decisions. Each query happens simultaneously, delivering complete results in seconds rather than minutes.
The tool shows you exactly which databases were checked, their response times, and the current status for the email address you're investigating.
Maximize Inbox Placement
Think about how much you rely on email. Your marketing campaigns, sales proposals, customer support responses, password resets, and order confirmations. When part of your email infrastructure gets blacklisted, those messages just don't arrive. Whether you're trying to figure out why your emails aren't landing, checking if a business partner's email is reliable, or just keeping tabs on your own sending setup, our free email blacklist checker tool shows you what's really going on. Takes less than a minute.
Results You Can Actually Use
We designed the results page to give you answers fast. Here's what to look for in your results:
The Big Picture Status:
Right away, you'll see if you're clean across all blacklists or if there are problems. We show the email address you checked, the domain we extracted from it, and the total count of blacklists we queried versus how many flagged issues. This tells you immediately if you're looking at a clean bill of health, one isolated problem, or something more serious.Email vs Domain:
We separate the email address from its underlying domain because that's an important distinction. Email addresses themselves don't get blacklisted; the domains, mail servers, and IPs behind them do. Understanding this helps you talk about the problem correctly and fix the right thing.Individual Blacklist Status:
Every database we query appears in the detailed results with its current status. Clean status is clearly indicated with visual confirmation, while any listings are prominently flagged for immediate attention.Response Time Validation:
Each blacklist query displays its response time in milliseconds, providing confidence in the accuracy and freshness of the data.Clean Status Verification:
When an email shows clean across all blacklists, you receive positive confirmation rather than just an absence of problems.This transparency helps you understand not just whether there's a problem, but how widespread it is and which specific blacklist operators have flagged the email infrastructure.
Unspam
