UChecker

Free email DNS tools: SPF, DKIM, DMARC checkers and record generators.

Webfreeglobal

uChecker is a free suite of 13 email DNS tools, including SPF, DKIM, and DMARC checkers, an MX lookup, and generators for SPF, DKIM, DMARC, BIMI, MTA-STS, and TLS-RPT records, all with no signup required. It is aimed at developers and email administrators who need to check or configure a domain's email authentication.

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Full match profile

Behind the summary, Matchbox keeps a richer profile of UChecker - the signals our matcher actually reads to decide when to surface it. It stays private; claim the listing to see and control it.

Problem & pain-point mapping
Who we surface it to (audience fit)
What it's a strong alternative to
Trust & credibility signals

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