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Status:

PROPOSED STANDARD

Authors:

D. Margolis
M. Risher
B. Ramakrishnan
A. Brotman
J. Jones

Stream:

IETF

Source:

uta (sec)

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DOI:  https://doi.org/10.17487/RFC8461

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Abstract

SMTP MTA Strict Transport Security (MTA-STS) is a mechanism enablingmail service providers (SPs) to declare their ability to receiveTransport Layer Security (TLS) secure SMTP connections and to specifywhether sending SMTP servers should refuse to deliver to MX hoststhat do not offer TLS with a trusted server certificate.

For the definition ofStatus,seeRFC 2026.

For the definition ofStream, seeRFC 8729.