Email Authentication Check
DMARC Tester
Authentication-Results: dmarc.tester;
spf=pass smtp.mailfrom=yourdomain.nl;
dkim=pass header.d=yourdomain.nl;
dmarc=fail header.from=yourdomain.nl
One header line decides whether your mail is delivered. Send a test message and read exactly what a receiving server sees: SPF, DKIM, DMARC, and whether the identifiers actually line up.
No account required. Read a sample report first.
Test Address
Mail us once from the domain you are checking
You get a test address that stays open until the timer runs out. We read the message it receives, then query your live SPF and DMARC records and show you where the two disagree.