On a blacklist? Find the way off it.

Spamhaus ZEN → ZEN is the blocklist most receivers actually consult. Here is what a listing means, and how to get off it. Barracuda (BRBL) → The BRBL is a widely used free DNSBL run by Barracuda Networks. Here is what a listing means and how to get your IP removed. SpamCop (SCBL) → The SCBL removes IPs automatically once reports stop. There is no form to fill in — here is what a listing means and how it clears. CBL (Abuseat) → The CBL is now part of the Spamhaus XBL. Here is what a cbl.abuseat.org listing means, and how to get off it. PSBL → PSBL is an easy-on, easy-off spamtrap blocklist. Here is why your IP is listed and how to clear it in minutes. Nixspam (ix.dnsbl.manitu.net) → Nixspam closed in January 2025. If your mail is being blocked "because" of it, the receiver is querying a list that no longer exists. Mailspike BL → Mailspike BL flags IPs caught in spam waves or carrying a poor reputation. Here is what a listing means, and how to get off it. SpamEatingMonkey BL (SEM-BLACK) → SEM-BLACK lists IPs that hit a spamtrap or breach policy. Here is what a listing means and how to clear it. SpamRats Spam → RATS-Spam is an evidence-based spam list. Stop the sending that triggered it, then remove the IP yourself for free. WPBL → The WPBL shut down in 2024 and lists nobody. If something still flags it, here is why, and what you actually need to fix instead. UCEPROTECT Level 1 → Level 1 lists single IPs that hit UCEPROTECT spamtraps. Stop the abuse and the listing clears itself in seven days. Anonmails DNSBL → A small German spam-trap blocklist that few receivers still consult. Here is what a listing means and how to request removal. Mailspike Z → Z is Mailspike's zero-hour list: IPs caught mid spam-wave. Here is what a listing means and how to clear it. SEM Backscatter → SEM Backscatter flags servers that bounce or auto-reply to forged senders. Here is what a listing means, and why the only real fix is to stop the backscatter. GBUdb Truncate → Truncate has no delist button. It is a statistical reputation list that clears itself once the bad mail stops. Here is what to fix and how long it takes. DroneBL → DroneBL flags compromised and abused hosts. Here is what a listing means, and how to get your IP removed. S5H → S5H is a small, spam-trap-driven IP blocklist run by System 5 Hosting. Here is what a listing means and how to clear it. NordSpam BL → The NordSpam BL flags IP addresses seen sending spam. Here is what a listing means and how to get your IP removed. Korea Services (korea.services.net) → A blunt, allocation-based list of Korean network space. Here is what a listing means and the realistic ways off it. InterServer RBL → InterServer's RBL has no removal button. Here is why your IP is listed, and why fixing the cause matters more than asking to be delisted. SINGULARis (TTK) → A small university-run blocklist that will still bounce your mail to the PTE Faculty of Sciences. Here is what a listing means and how to clear it. IMP Spam → IMP Spam is ImproWare's IP blocklist of addresses seen sending spam. Here is what a listing means and how to get off it. IMP Worm → IMP Worm lists IPs caught spreading worms or viruses. Here is what a listing means, and how to clear it. Virus RBL JP → virus.rbl.jp flags IPs sending virus-infected mail. Clean the source and the listing clears itself. SpamRats Dyna → RATS-Dyna is not a spam list — it is a reverse-DNS list. Fix the PTR record and the listing clears. SpamRATS NoPtr → RATS-NoPtr flags sending IPs that have no reverse DNS. Fix the PTR record and you can clear it yourself. SpamRATS Auth → RATS-Auth flags IP addresses seen attacking authentication. Here is what a listing means, and how to get off it. ORVEDB → ORVEDB is an old open-relay list from ANTISPAM-UFRJ. Here is what a listing means, and why fixing your server is the whole job. BlockedServers NetScan → NetScan is a low-impact, IP-based list for hosts caught port-scanning. Here is what a listing means and how to clear it. Blockedservers RBL → Blockedservers is a free, self-service DNSBL. A listing is usually low impact, and you can request removal yourself once the cause is fixed. Blockedservers Spam → Blockedservers Spam is a small IP blocklist with free, self-service removal. Here is what a listing means and how to clear it. SPFBL → SPFBL is a reputation blocklist driven by recipient complaints. Here is what a listing means and how to clear it. Unsubscore (LashBack UBL) → Unsubscore is the DNS zone for the LashBack Unsubscribe Blacklist. Here is what a listing means and how to get off it.