Deliverability Radar

Enter a domain or IP address for a complete deliverability audit, DNS, MX, SPF, DKIM, DMARC, BIMI, MTA-STS, blocklists, reverse DNS, SMTP connectivity, scored out of 100, with the exact fix for every gap. Free, no signup, nothing stored.

One unified report instead of 20 separate lookups. Powered by the same engine behind our deliverability test and blocklist checker.

Data · Email checker · Email verifier · Blocklist checker · Blocklists explained · Widget

Built & updated automatically by MailTester Ninja, the email verifier that stores nothing. DNS-only, aggregate data, no personal information. · JSON API · RSS