IP Reputation Checker
Check if your mail server IP is blacklisted. 5 major blacklists + geo-location + deliverability risk score.
We check your IP against Spamhaus, SpamCop, Barracuda, SORBS, and PSBL.
Blacklists We Check
🔴 Spamhaus ZEN — The most authoritative spam blacklist. Combined SBL, CSS, and XBL.
🔵 SpamCop — Crowd-sourced spam reporting. Being listed here affects many small ISPs.
🟠 Barracuda Central — Used by Barracuda email security appliances at thousands of companies.
🟡 SORBS — One of the oldest and most aggressive blacklists. Known for listing dynamic IPs.
🟢 PSBL — Passive Spam Block List. Low false-positive rate, good indicator of ongoing spam.