Free tool
Blocklist check
A blocklist check shows whether your IP or domain is listed on the major blocklists (DNSBLs). A single Spamhaus, Barracuda or SpamCop listing can wreck deliverability.
Step 1–4
How it works
- 1
Enter your sending IP or domain.
- 2
We query the major DNSBLs (Spamhaus, Barracuda, SpamCop, …).
- 3
We show which lists you appear on.
- 4
Fix the cause and request delisting on the list’s site.
FAQ
How do I get off a blocklist?
First fix the cause (breach, spam, open relay), then submit a delisting request on that DNSBL’s site.
How often should I check?
Regularly — especially before large sends and after any deliverability incident.
Start sending in minutes
Free to start. Scale when you grow. Your customers get every message.
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