Blacklist Check — Is Your IP Listed?

Spamhaus verdict with plain-English reasons + delisting steps. Free.

Type your mail server's public IP to see whether Spamhaus lists it, with the reason in plain English and delisting steps. Clean here means clean on the web's most-used list — not everywhere.

What this proves — and what it doesn't

Proves: Queries Spamhaus ZEN live and translates return codes into causes (spam source, exploited host, residential range).

Does not prove: Does not check every blacklist on earth, and delisting requires fixing the underlying abuse first.

How to use it

  1. Type your mail server's public IP (not your home IP).
  2. Read the verdict: clean, or listed with the exact reason.
  3. Listed? Fix the cause first, then request delisting at Spamhaus.

Common questions

Residential IP listed — problem?

Expected: residential ranges shouldn't send mail directly. Route via your provider's smarthost.

Delisted but still bouncing?

Check MX/SPF/DKIM records next — authentication failures bounce independently.

Records wrong? DNS lookup → · Domain intel? WHOIS →