Blacklist Tools

Check your IP or domain against The Spamhaus Project in real-time. Execute live ZEN, DBL, XBL, and PBL queries to parse 127.0.0.x return codes and protect deliverability.

Cross-reference your IP or domain against authoritative global spam databases in real-time. Execute live DNS queries, parse threat intel return codes, and fix 550 bounces.

Execute live, uncached reversed IP lookups against 50+ global RBLs. Instantly detect open relays, parse 127.0.0.x return codes, and resolve 550 SMTP rejection errors.

Check your mail server reputation in real-time. Execute live DNSBL lookups against 60+ anti-spam databases to detect open relays and fix SMTP 550 bounce errors.

Calculate your IP sender score in real-time. Execute live queries against global threat intelligence networks like Cisco Talos and AbuseIPDB to detect botnets and audit IP reputation.

Scan your server's IPv4 address against 45+ global DNSBL and RBL databases in real-time. Detect spam listings, expose malware infections, and fix 550 bounce errors instantly.

Calculate your email sender score in real-time. Execute live DNSBL lookups and query global threat intelligence networks to check your email reputation and blacklist status.

Scan your email address against 50+ global spam databases and honeypots in real-time. Execute live DNSBL and DBL lookups to detect spam trap hits and protect deliverability.

Instantly check if your email is blacklisted. Automatically extract domains to execute live, concurrent queries across 60+ global RBL and DBL databases to prevent 550 bounce errors.

Cross-reference email addresses against 50+ global honeypots and threat intelligence databases. Detect spam, phishing, and abuse reports in real-time.

Scan your domain's reputation in real-time. Execute live cross-references against threat intelligence networks to calculate a trust score, analyze domain maturity, and detect active malware flags.

Scan your domain against 40+ DBL and URIBL databases in real-time. Detect spam listings, phishing flags, and malware associations to protect email deliverability and SEO health without cached data.

Execute massive parallel queries against 50+ DNSBL zones. Instantly reverse IPv4 octets to identify active A-records, parse 127.0.0.x codes, and troubleshoot SMTP 550 errors.

Execute live recursive DNS queries against 60+ global DNSBL zones. Instantly check IP and domain blacklists, reverse IPv4 octets, and parse precise A-record return codes.