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Card 504 of 9982026-09-01 issue

Observed arrival · 2026-09-01

mailauth turns raw email headers into a forensic report

mailauth.app Observed source
Editorial interest 84/100 Selection signal · not a rating of the site

A free, client-side analyzer that checks SPF, DKIM, DMARC, delivery paths, policy records, and spoofing risk from a pasted email header.

Landing page captured for the 2026-09-01 issue.

Field notes

The analyzer accepts a pasted raw email source and produces a combined view of authentication, routing, policy, and reputation signals. Its sample report assigns a B 88/100 grade, identifies a DMARC p=none policy, and shows separate DKIM alignment results alongside TLS versions and relay timings. The site also exposes a 26-term glossary and says its provider references are maintained as 16 dated sources, giving users a way to inspect the terminology and evidence behind its findings.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

OpenPublic substance visible
PrettyNotable craft visible
ProPolished or operationally mature
NicheUnusually specific use
ƒJavaScriptBrowser-side code central

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mailauth.app

Landing page observed 2026-09-01. The live site may have changed.