Scan your IP address against 40+ DNS-based email blacklists used by major email providers to filter spam and malicious traffic.
DNSBLs are real-time databases of IPs identified as sources of spam or abuse. Email servers query these lists to decide whether to accept incoming mail.
Sending spam, hosting malware, running open relays, being part of a botnet, or sharing an IP range with known spammers.
Recipient mail servers may silently reject or spam-folder your emails when your sending IP appears on a blacklist.
Fix the underlying issue first, then request removal through the blacklist operator's self-service delisting process.
The most widely-used blocklist. SBL tracks spam sources, XBL lists exploited machines, PBL identifies dynamic IPs.
Community-driven and appliance-based blacklists powered by spam reports and threat intelligence from global deployments.
Comprehensive coverage including SpamRATS, DroneBL, Blocklist.de, abuse.ch, Mailspike, NordSpam and more.
Authorizes which IPs can send for your domain
Cryptographically signs emails to prove authenticity
Instructs receivers how to handle failed auth
Reverse DNS confirms your mail server identity
Join thousands of businesses that trust IPPTR for reliable, high-performance DNS management and data center services.