Blocklist checker
Check whether a domain or IP is listed on the major security and spam blocklists.
Enter a domain and we check it and its IP against the major security and spam blocklists that mail providers and security tools trust.
What this checks
- The domain and its resolved IP against widely-used security and email blocklists such as Spamhaus, Barracuda, and SpamCop.
- Whether each blocklist currently lists the domain, and the detail behind any listing.
- For context, whether common content-filtering resolvers block the domain (informational only).
Why it matters
A listing on a security or spam blocklist quietly damages a domain's reputation: legitimate email starts landing in spam or bouncing, and some security tools warn users away. Listings often happen without warning, after a compromise or a spam incident, and can persist until you notice and request delisting. Checking regularly means you catch a reputation problem before it costs you deliverability.
Frequently asked questions
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This is a one-time snapshot.
Ranetrace runs this check around the clock and tells you the moment something changes, so you hear about a problem before your visitors do. Monitoring for Laravel and PHP apps, from the outside and the inside.