Delisting is the process of removing an IP address from a blocklist (RBL/DNSBL) after the underlying abuse issue has been resolved. This guide on robtex.com covers removal processes for major RBLs and strategies for successful delisting.
Delisting Process Types
Automatic expiration. Many lists automatically remove IPs after a period without abuse. Do nothing (after fixing the problem) and wait.
Self-service removal. Some lists offer web forms or email addresses for removal requests. Follow their specific instructions.
Time-locked removal. Repeated listings may result in longer listing periods. First offense might be 24 hours; subsequent listings could be weeks.
Manual review. High-profile or repeat listings may require human review. Expect slower processing and possible questioning.
No removal. Some specialized lists don't offer removal - you're listed permanently or until they decide otherwise.
Major RBL Delisting Procedures
Spamhaus
SBL (Spamhaus Block List): Request removal through their lookup tool. Explain what caused the listing and what you've fixed. Response time varies.
XBL (Exploits Block List): Usually automatic removal after the exploit is fixed and traffic stops. Can take 24-48 hours.
PBL (Policy Block List): Not a blocklist for spam - it's policy. Removal requires proving your IP should send email directly. Most legitimate senders use their ISP's mail servers instead.
Barracuda
Self-service removal through their website. Requires email verification. Usually processes within 12-24 hours.
SpamCop
Automatic expiration, typically 24-48 hours after spam stops. No manual removal process. Just stop the spam and wait.
SORBS
Request removal through their website. Some listings are free to remove; others require nominal payment (controversial, but it's their policy).
Delisting Best Practices
Don't request removal before fixing the problem. RBLs track removal requests. Immediate relisting after removal request damages your credibility.
Be honest about what happened. Claiming you "never sent spam" when logs show otherwise undermines your request.
Don't be aggressive or threatening. RBL operators volunteer their time. Abusive removal requests get ignored or blacklisted.
Follow instructions exactly. If a form asks specific questions, answer them. Don't send generic requests.
Accept that some listings take time. Repeat offenders face longer listings intentionally. Patience is required.
→ Check your listing status on robtex.com