Email Authentication Tools

Full Report

MX, SPF, DKIM, and DMARC checked in one pass with health score and actionable advice.

87 Health Score

MX

SPF

DKIM

DMARC

Validate SPF records against the 10-lookup limit and check for common misconfigurations.

v=spf1 include:_spf.google.com
include:servers.mcsv.net ~all

DNS lookups

4 / 10

Look up DKIM public keys, verify selectors, and check key strength.

v=DKIM1; k=rsa; p=MIGfMA0GCS...

2048-bit RSA selector: google

Parse DMARC policies, check alignment, verify reporting addresses, and get upgrade advice.

v=DMARC1; p=reject;
rua=mailto:[email protected];
adkim=r; aspf=r; pct=100

p=reject Reporting ON

Paste raw email headers to trace relay hops, check authentication results, and find delays.

sender-smtp.google.com SPF: pass · DKIM: pass

mx.recipient.com TLS 1.3 · 42ms

Delivered to inbox DMARC: pass (aligned)

Send a test email and get instant deliverability analysis including authentication and content checks.

SPF

DKIM

DMARC

Content