SpellzCode — Email auth check: SPF, DKIM, DMARC (MPP)
https://agent-data-tools.revmesh2074.workers.dev/email/auth?domain=github.comOverview
Email authentication check for a domain: the SPF record and its all-policy, DKIM keys at the common selectors, the DMARC record and policy, plus MX, MTA-STS, TLS-RPT and BIMI, with a 0-100 score, a grade and a list of fixes. Public DNS only; no mail is sent. Use to verify a sender domain's SPF, DKIM and DMARC setup, to debug mail landing in spam, or to vet a domain before trusting its mail.