Email Blacklist & IP Reputation Checker

Is your domain or mail IP on a spam blacklist? Check the major DNSBLs.

✓ Clean — not listed on any of the blocklists checked · ⚠ Listed on of blocklists ·

Why your email lands in spam

Mailbox providers check the sending IP and domain against DNSBLs before delivery. A listing — from a compromised server, a shared IP with a bad neighbour, or a misconfigured mail setup — can route your mail straight to junk. Checking regularly catches it early.

Blacklist Check — TechWhack Score

8/10

Privacy 7/10

It queries public blocklists in real time and stores nothing of yours.
Speed 8/10

Queries the major DNSBLs and reports back in seconds.
Features 7/10

Checks a domain or mail-server IP against the DNSBLs mail providers use — a common reason legitimate mail lands in spam.
Free 10/10

No sign-up and no monitoring upsell to use the on-demand check.

Verdict: A clean on-demand blacklist check with no sign-up and none of the paid-monitoring nag the big mail-tools push.

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An email blacklist (DNSBL) checker tells you whether a domain or IP is listed on the blocklists mail providers use to filter spam. Enter a domain or mail-server IP and it queries the major DNSBLs in real time — being listed is a common reason legitimate mail lands in spam.

How to get delisted

Fix the cause first (secure the server, set up SPF, DKIM and DMARC, stop any spam), then request removal through each blacklist's delisting form. Most delist within hours to days once the issue is resolved and they re-scan.

FAQ

Why are my emails going to spam even though I am not sending spam?A common cause is that your sending domain or mail-server IP has landed on a DNSBL blacklist, which receiving servers check before accepting mail. This tool checks you against the major blacklists in real time so you can see if that is the reason.

What is a DNSBL or RBL?A DNSBL (DNS-based blocklist), also called an RBL, is a live database of IPs and domains known for sending spam, which mail providers query to filter incoming mail. If you are listed, your messages can be blocked or sent straight to the spam folder.

Should I check my domain or my mail-server IP?Check both, because blacklists track domains and sending IPs separately, and either being listed can hurt delivery. Shared sending IPs can also be listed because of another sender on the same address.

How do I get removed from an email blacklist?First fix the root cause, such as a compromised account, a misconfigured server, or a bad list, then submit a delisting request to each blacklist operator. Setting up SPF, DKIM, and DMARC and cleaning your list helps prevent a relisting.