Which IP or domain should I check?

Check the IP that actually sends your mail. If you send through a provider (like Amazon SES, Postmark, or your own server), that is the provider's sending IP, which you can find in your email headers under 'Received' or in your sending platform. Also check your sending domain and the domain in your links, since domain-reputation lists like Spamhaus DBL target those.

I am blacklisted. How do I get removed (delisted)?

First, fix the cause: stop any spam or compromised accounts, clean your list, and make sure SPF, DKIM, and DMARC pass. Then use the delist link shown next to each list to submit a removal request. Some lists auto-remove once the bad behavior stops; others require a manual request. Delisting before you fix the root cause usually gets you relisted fast.

Why is my domain listed on some blocklists but not others?

Every blocklist has its own data, thresholds, and focus. Spamhaus ZEN bundles several lists and is the one most receivers use, so a listing there matters most. Smaller lists like SORBS can list an IP for a policy reason (like being on a dynamic/residential range) that a big receiver ignores. Prioritize the widely used lists, but investigate any listing.

Does being on a blacklist always mean my email goes to spam?

Not always, but it is a serious risk. A listing on a major, widely used blocklist like Spamhaus can cause hard rejections at the biggest mailbox providers. A listing on an obscure list that few receivers consult may have little practical impact. Either way, blacklists are only one input. Sender reputation, authentication, and engagement matter just as much, which is why deliverability is a system, not a single checkbox.

Free Email Tool

Email Blacklist Checker for your domain and IP

Enter your sending domain or IP and check it against Spamhaus, Barracuda, SpamCop, SORBS, and domain-reputation blocklists in real time. Get a plain-English verdict per list and the exact steps to get delisted.

Instant, no signup Runs in your browser Free forever

Enter your sending domain or IP above to check it against the major blocklists.

Why this matters

A single blacklist listing can sink your deliverability

Receiving mail servers check blocklists (DNSBLs) in real time, before your email even reaches an inbox. If your sending IP or domain is on a widely used list like Spamhaus ZEN, the biggest mailbox providers may reject your mail outright or file it straight into spam, no matter how good your copy is.

The tricky part: you often get no warning. Your open rates just quietly fall. Checking your domain and sending IP regularly is the fastest way to catch a listing early, find out which list flagged you, and start the fix before it costs you a whole campaign.

What we check

The blocklists this tool queries

Spamhaus ZEN. The most consulted blocklist, bundling the SBL, XBL, and PBL. A listing here is the one that hurts most.
Barracuda & SpamCop. Widely used reputation lists that many mail servers query alongside Spamhaus.
SORBS. A long-running list that also flags dynamic and policy-blocked ranges, useful for spotting network-level issues.
Spamhaus DBL & SURBL. Domain-reputation lists that target the domains inside your email (your from-domain and any links), not just IPs.

If you are listed

How to get off an email blacklist

Fix the cause first. A listing is a symptom. Find and stop the source: a compromised account, a bought list, a spike in bounces or spam complaints, or a missing authentication record. Delisting before you fix the cause almost always leads to a re-listing.

Authenticate. Confirm SPF, DKIM, and DMARC all pass for your sending domain. Unauthenticated mail is both more likely to be listed and harder to recover.

Request removal. Use the delist link this tool shows next to each list. Some lists remove you automatically once the bad behavior stops; others need a manual request and a short cool-down.

Then protect your reputation. Warm up new IPs and domains slowly, keep your list clean, and only send mail people asked for. Reputation is earned over weeks and lost in a day.

Stay off blacklists by owning your sending, not renting it.

Meisa runs on your own authenticated domain and sending infrastructure, keeps your list clean automatically, and sends to your most engaged contacts first so your reputation climbs instead of eroding. That is how you land in the inbox and stay there, instead of firefighting listings after the damage is done.

Own your sending. Land in the inbox. 14-day money-back guarantee.

FAQ

Email blacklist questions

An email blacklist, also called a DNSBL or RBL, is a published list of IP addresses and domains that a provider believes have sent spam. Mail servers query these lists in real time. If your sending IP or domain is listed on a major blacklist like Spamhaus, receiving servers may reject your mail outright or route it straight to spam, so a listing can quietly tank your deliverability.

Free Email Tools

See all free email tools

Email Blacklist Checker for your domain and IP

A single blacklist listing can sink your deliverability

The blocklists this tool queries

How to get off an email blacklist

Stay off blacklists by owning your sending, not renting it.

Email blacklist questions

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