RFC 8689

SMTP Require TLS Option (REQUIRETLS)

TLS

Defines the REQUIRETLS SMTP extension that allows senders to require TLS for the entire message delivery path, preventing downgrade attacks.

SMTP TLS REQUIRETLS Email Security Encryption MTA
Published: 2019-11

RFC 8689 - SMTP Require TLS Option

This document defines the REQUIRETLS SMTP extension that allows senders to require TLS for the entire delivery path.

Abstract

The REQUIRETLS SMTP service extension allows an SMTP client to specify that a message must be transmitted using TLS, and that the receiving server must also use TLS when relaying the message.

RFC 8689 - SMTP Require TLS Option This document defines the REQUIRETLS SMTP extension that allows senders to require TLS for the entire delivery path. Abstract: The REQUIRETLS SMTP service extension allows an SMTP client to specify that a message must be transmitted using TLS, and that the receiving server must also use TLS when relaying the message.
Quick Info
RFC Number:
8689
Category:
TLS
Published:
2019-11
External Links:
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