Check if an IP address appears on major email blacklists and DNS-based blocklists (DNSBL/RBL). Tests against Spamhaus ZEN, Barracuda, SpamCop, SORBS, UCEPROTECT, and more. Essential for email deliverability troubleshooting.
Diagnosing why outbound emails are being rejected, checking a new server IP before sending mail, monitoring your mail server's reputation, or verifying an IP has been delisted after remediation.
Check if an IP address is listed on major email blacklists (DNSBL/RBL). Checks Spamhaus, Barracuda, SpamCop, SORBS, and more.