Blacklist Checker is an email blacklist tool and API that checks 100+ blacklists in seconds.

Blacklist Checker API tests any IP address, email address or domain name across 100+ different email blacklists. Blacklists can also be called names like realtime blacklist, DNSBL, or RBL. If your mail server has been blacklisted it’s likely that some of your emails will not delivered.

TEST YOUR EMAIL ADDRESS, DOMAIN NAME, OR IP ADDRESS

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TRUSTED BY COMPANIES LARGE AND SMALL

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blacklist

blacklists that we check

Our Blacklist API helps detect issues on your domain name, email address or IP address. There are hundreds of blacklists across the internet that email service providers use and actively check. These lists are constantly being updated so its best to check your IP against blacklists often. Here’s a list of blacklists that we check on our API.

SORBS

Return Path

Truncate

Barracuda

PSBL

WPBL

Cloudmark CSI

SpamCop

Backscatterer

Invaluement

Spamhaus

Brute Force Blocker

0 Spam

UCEPROTECT

IPSpamList

InterServer

JamesBrine IP List

JustSpam

LAPPS Grid

Liquid Binary

Nginx Bad Bot

100+ more blacklists

Designed for developers

Immediately check and monitor blacklists via our API

With our blacklist checker API you can easily monitor all of your emails and IP to know when you land on a blacklist. Our API is built to be easy to use and return responses fast.

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Get started with 50 free requests per month

Programmatically check any domain name, email address or IP address against the internet’s most common and popular blacklists. Know when your reputation is damaged so you can work to correct it ASAP.

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