DNS Blacklist Checker
Is an IP address or domain on a spam blacklist? Checks 15 widely used DNSBL and URIBL lists at once.
Try:
Each list is queried directly at its own name servers (many lists refuse queries from big public resolvers, which makes other checkers show false "clean" results). A domain is checked by its address and by the domain blocklists. Limited to 30 checks per 10 minutes.
About this tool
What does listed mean?
Mail servers use these lists to reject or flag email. A listing on Spamhaus SBL/XBL, Barracuda or SpamCop usually hurts delivery; smaller lists matter less.
Spamhaus PBL
The PBL marks ISP address ranges that shouldn't send mail directly (home and dynamic connections). It's a policy list, not an accusation of spam: send through your provider's mail server instead.
Getting delisted
Fix the cause first (a compromised account, an open relay, malware), then follow each list's link for its removal form. Many lists expire entries automatically once the spam stops.