MTA-STS in Practice: Adoption, Tooling, and Real Implementation
MTA-STS closes the STARTTLS downgrade hole by letting domains require verified TLS for inbound mail. The policy file, the DNS record, and the gotchas in between.
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MTA-STS closes the STARTTLS downgrade hole by letting domains require verified TLS for inbound mail. The policy file, the DNS record, and the gotchas in between.