Free blacklist checker · Instant · No signup
Blacklist Checker
Check whether your sending IP or domain is blacklisted. Domain Doctor queries major DNSBLs and tells you where you are listed and how to get delisted.
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What this checks
Blacklists (DNSBLs) are used by mail servers worldwide to block spam. If your sending IP or domain lands on a major list like Spamhaus, your email starts bouncing or landing in spam — often without warning.
Domain Doctor checks your IP against reputable IP blacklists and your domain against domain reputation lists, distinguishing a real listing from a list that is simply unavailable. A single Spamhaus SBL listing is serious; a transient spamtrap listing may clear on its own.
Common Blacklist Checker errors
- Sending IP listed on Spamhaus SBL/CSS
- Domain listed on the Spamhaus DBL for abuse
- Shared hosting IP tainted by another tenant
- New IP with no reputation, throttled by receivers
- Compromised account sending spam and getting you listed
VASTROX EMAIL DELIVERABILITY
Get delisted and stay clean
We find the root cause of a listing, fix it, request delisting, and monitor your reputation so it does not come back.
- Root-cause diagnosis and fix
- Delisting requests submitted for you
- Ongoing reputation monitoring
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Frequently asked questions
Why is my IP blacklisted?
Common causes are sending spam (often from a compromised account), a shared IP tainted by another user, or a brand-new IP with no reputation. Fix the source first, then request delisting.
How do I get delisted?
Each blacklist has its own removal process. Resolve the underlying issue (secure accounts, fix authentication), then submit a delisting request on the list’s website. Spamhaus and others require the cause to be fixed first.
Does one blacklist listing matter?
It depends on the list. Spamhaus and Barracuda are widely trusted and a listing there has real impact. Smaller or spamtrap-driven lists carry less weight and often auto-expire.