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MTA-STS Validation — Verify your security policy is live and properly enforced. Validate →

How does MTA-STS improve email security?

  • By enforcing encryption and certificate validation MTA STS:
  • Prevents attackers from intercepting or altering messages.
  • Stops downgrade attacks where a server pretends TLS is unavailable also called STARTTLS stripping attacks.
  • Ensures confidentiality between servers.
  • It keeps the mail ship traveling through protected channels rather than open waters where pirates lurk.
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