Email Security Analysis of mathsyx.fr
Complete verification of mathsyx.fr's SPF, DKIM, DMARC, and MTA-STS records. Find out if this domain is protected against email spoofing.
Last updated: April 14, 2026
SPF
OKv=spf1 -allDKIM
OKSelectors: google, default, selector1, selector2, k1, mandrill, dkim, mail, smtp, s1, s2, protonmail, protonmail2, protonmail3, zendesk1, zendesk2, resend, everlytickey1, cm, mxvault, zoho, zmail, fm1, fm2, fm3DMARC
OKv=DMARC1;p=reject;sp=reject;adkim=s;aspf=sMX
MissingNo record found
Recommendations
1Add rua=mailto:dmarc@yourdomain to your DMARC to receive reports
Without DMARC reporting (rua=), you have no visibility into who is sending email on behalf of your domain. Aggregate reports let you detect spoofing attempts, identify misconfigured legitimate senders, and confidently tighten your policy over time.
2Add MTA-STS to enforce TLS encryption for incoming emails
Without MTA-STS, an attacker performing a man-in-the-middle attack can downgrade the connection between mail servers to plaintext, intercepting emails in transit. MTA-STS tells sending servers to only deliver via TLS with a valid certificate, preventing downgrade attacks.
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Analyze mathsyx.fr liveGuides to understand these results
SPF Guide
Understand how SPF defines which servers are authorized to send emails for a domain.
DKIM Guide
Discover how DKIM cryptographically signs your emails to guarantee their authenticity.
DMARC Guide
Learn how DMARC orchestrates SPF and DKIM to protect your domain.
MTA-STS Guide
Learn how MTA-STS enforces TLS encryption to protect your emails in transit.
SPF vs DKIM vs DMARC
Compare the three protocols and understand how they work together.