Email Blacklist Checker
Check whether your domain appears on major spam blacklists. A blacklisted domain means your emails go to spam — or don't arrive at all.
Major Blacklists We Check
Spamhaus
The most respected blacklist. Appearance on SBL, XBL, or PBL means serious deliverability issues across all major providers.
Barracuda
Used by thousands of corporate mail gateways. Barracuda listings frequently cause B2B delivery failures.
MX Toolbox / SURBL
URI-based blacklists that check domains appearing in spam message bodies, not just sending infrastructure.