email-blacklist-checker
Email Blacklist Checker
Check your domain's sending IPs against major DNS blacklists.
Find out if your domain or mail servers are on an email blacklist. We resolve your sending IPs and check them against the most widely used DNSBLs.
Resolve, Query, Report
Enter a domain (or IP) and we:
Frequently asked questions.
Why is my IP blacklisted?
Common causes are spam complaints, compromised accounts, or sending from a shared IP with poor reputation. Each list has its own delisting process.
Some lists show an error — why?
A few blacklists block queries from cloud providers. We mark those as errors rather than falsely reporting clean.
How long does delisting take?
It varies by list — some remove you automatically after a set period, others require a manual removal request that can take a few hours to a few days.
Does a blacklisting affect my whole domain?
Usually it's the sending IP that's listed, not the domain itself. But repeated issues can eventually damage your domain's overall sender reputation too.
Can I prevent getting blacklisted?
Keep bounce and complaint rates low, use double opt-in for your lists, and monitor your sending reputation regularly with tools like this one.
Which blacklists matter the most?
Spamhaus and Barracuda carry the most weight with major mail providers — a listing on either can seriously impact inbox placement.
Struggling with deliverability?
