Blacklist Checker icon

Blacklist Checker

Check IPs and domains against 100+ DNS blacklists

Description

Service that checks an IP address, domain name or email address against 100+ email DNS blacklists (DNSBLs/RBLs) to determine whether it is listed, which would harm mail deliverability. Returns per-list status as normalized JSON via a REST API, with a developer dashboard and a free monthly request allowance.

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