Blacklist Checker
Queries well-known DNS blacklists to see whether an IPv4 address or a domain is listed — the usual explanation when mail is being rejected or silently dropped. A domain is checked on the domain lists and its address on the IP lists.
- Limits No file upload · Up to 666 runs a day
- Where it runs Runs on our server; no file is uploaded.
- Cost Free, with the limits above. No account needed.
Where to find it
Every address below opens the same tool. The first address is the one to bookmark and share.
- blacklist.openvibe.toolsPrimary
People also call this
What it's for: Check whether an IPv4 address or a domain is listed on major email blacklists and RBLs, with the reason and a delisting link. Find out why mail is rejected.
What trips people up: What does "refused the query" mean? Some lists do not answer queries that come through large DNS resolvers. That is not a listing; check that list on its own website.
- blacklist check
- rbl lookup
- ip blacklist checker
- email blacklist
- spam list check
Use it from code
POST https://openvibe.tools/api/v1/tools/blacklist/run- No account needed: anonymous calls run on the lowest quota tier; a token with
tools.tool.runraises it. - It answers with the result.
curl -X POST https://openvibe.tools/api/v1/tools/blacklist/run \
-H 'Content-Type: application/json' \
-d '{"input":{"target":"example.com"}}'Inputs: JSON Schema · OpenAPI · from JavaScript: tools.run("blacklist", …) in openvibe-sdk · How the API works
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