Listed on Spamhaus ZEN (SBL+XBL+PBL)? How to get delisted
zen.spamhaus.org
What a listing means
ZEN combines Spamhaus SBL, XBL and PBL in one query. It is one of the most widely used blocklists, so a listing here blocks mail at many large receivers.
How removal works
Look the IP up on the Spamhaus checker to see which component (SBL, XBL or PBL) lists it, then follow that component’s process.
Before you request removal
- Confirm the listing with ProbeKit’s blacklist check and note every list that shows the IP or domain.
- Find the cause: compromised mailbox passwords, malware on a device, an open relay or open proxy, a misbehaving web form, or sending to purchased or stale lists.
- Fix it, and make sure the IP has a proper reverse DNS (PTR) name and that SPF, DKIM and DMARC pass for your mail.
- Use the list operator’s removal process. Requesting removal before fixing the cause usually gets the IP relisted.
- Re-check after a day, and add a blacklist monitor so you hear about the next listing before your users do.
Check your IP or domain now
Type a domain, IP, email or URL and pick a check, or a prefix like Pick a check, or type a prefix like spf: · press / to search
Blacklist check · Reverse DNS · SMTP test · Guide: “550 5.7.1 … Spamhaus”