yale.edu email security: SPF, DKIM & DMARC
Is yale.edu spoofable? See yale.edu's SPF, DKIM, DMARC and MTA-STS records and find out if this domain is protected against email spoofing.
Last updated: June 25, 2026
DKIM
OKSelectors: google, selector2, k1, mail, s1, s2, zendesk1, zendesk2, cmMX
MissingNo record found
Recommendations
1Add a DMARC record: _dmarc.yourdomain TXT "v=DMARC1; p=reject; adkim=s; aspf=s; rua=mailto:dmarc@yourdomain"
Without DMARC, receiving mail servers have no way to know what to do when SPF or DKIM checks fail. Anyone can send emails pretending to be from your domain, and most servers will deliver them. DMARC with p=reject tells receivers to block unauthorized emails entirely.
2Add an SPF record: yourdomain TXT "v=spf1 include:yourprovider -all"
SPF tells receiving servers which IP addresses are allowed to send email for your domain. Without it, any server in the world can send emails appearing to come from you. Adding SPF with -all (hardfail) means unauthorized senders will be rejected.
3Add 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 yale.edu liveFrequently asked questions about yale.edu
Is yale.edu spoofable?
Yes. yale.edu does not enforce a strong DMARC policy, so attackers may be able to send emails that appear to come from yale.edu. Email security score: 25/100 (grade F).
Does yale.edu have an SPF record?
No SPF record was found for yale.edu, which makes it easier to spoof.
What is yale.edu's DMARC record?
No DMARC record (_dmarc.yale.edu) was found for yale.edu.
Does yale.edu use DKIM?
Yes, DKIM signatures were detected for yale.edu.
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Guides 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.