Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.5 Message Specification

Document Type Replaced Internet-Draft (individual)
Authors Jim Schaad  , Blake Ramsdell  , Sean Turner 
Last updated 2016-07-08
Replaced by RFC 8551
Stream (None)
Intended RFC status (None)
Expired & archived
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Stream Stream state (No stream defined)
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IESG IESG state Replaced by draft-ietf-lamps-rfc5751-bis
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document defines Secure/Multipurpose Internet Mail Extensions (S/MIME) version 3.5. S/MIME provides a consistent way to send and receive secure MIME data. Digital signatures provide authentication, message integrity, and non-repudiation with proof of origin. Encryption provides data confidentiality. Compression can be used to reduce data size. This document obsoletes RFC 5751.


Jim Schaad (
Blake Ramsdell (
Sean Turner (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)