Email blacklist checker.
See if your IP or domain is on a spam blocklist, how serious each listing is, and how to get removed.
Not every listing matters equally.
We group each blocklist by how much it affects your delivery.
Major
Widely used by mail servers and spam filters. A listing here hurts delivery to many inboxes. Fix these first.
Minor
Smaller or regional lists used by fewer servers. Worth delisting, but the impact is usually limited.
Network-wide
Lists like UCEPROTECT Level 2 and 3 block whole hosting providers. You're listed because of neighbours, and most providers ignore them.
Blacklisted? Here's how to recover.
- 1
Find the cause
Listings follow spam complaints, hits on spam traps, compromised accounts or sudden volume spikes. Fix the cause first or you'll be relisted.
- 2
Pause affected mailboxes
Stop cold sending from the listed IP or domain while you clean up. Keep warmup and replies going.
- 3
Clean your list
Remove bounces, unengaged contacts and anyone who didn't opt in. Verify new leads before sending.
- 4
Request removal
Use the removal link for each list. Some (like SpamCop) expire on their own within 24–48 hours once spam stops.
Prevention beats removal
- • Warm up new mailboxes before sending campaigns.
- • Keep each mailbox to a modest daily volume.
- • Verify every list before you send.
- • Send cold email from secondary domains, never your main one.
- • Monitor blocklists daily so you catch listings early.
Catch listings before they cost you replies.
Deliveryman monitors every sending domain against blocklists daily and pauses campaigns before damage is done.
Frequently Asked Questions
What is an email blacklist?
A blacklist (or blocklist, DNSBL) is a public list of IP addresses or domains known to send spam. Mail servers check incoming email against these lists and reject or spam-folder mail from listed senders.
Which blacklists do you check?
19 lists: SpamCop, Barracuda, UCEPROTECT Level 1, Mailspike, PSBL, 0spam, NordSpam, SPFBL, Spam Eating Monkey, GBUdb Truncate, InterServer, JustSpam, s5h.net, Anonmails, blocklist.de, SEM Backscatter, UCEPROTECT Level 2, UCEPROTECT Level 3, NordSpam DBL. Spamhaus, CBL, URIBL and SURBL aren't included because they refuse lookups through public DNS services, which this tool uses to run in your browser.
Should I check my IP or my domain?
Enter your domain: we'll check the domain itself and the IPs of its website and mail servers. If you know your sending server's IP (shown in the Received headers of an email you sent), check that directly too.
I use Google Workspace or Microsoft 365. Can my IP be blacklisted?
Their shared sending IPs are managed by Google and Microsoft, so IP listings rarely affect you. What matters is your domain's reputation, which comes from your authentication, volume and engagement. Use our Domain Health Checker for that.
How long does it take to get delisted?
It depends on the list. Some expire automatically within 24–48 hours once spam stops (SpamCop, PSBL). Others need a removal request and can take a few days. A few charge for express removal: you never need to pay, as listings expire on their own.
Is my lookup stored anywhere?
No. Every check runs in your browser against public DNS. We don't log the IPs or domains you check.