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RFC 4954 - SMTP Service Extension for Authentication

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SMTP Service Extension for Authentication (RFC 4954, )

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RFC 4954: SMTP Service Extension for Authentication

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IETF Datatracker

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This document defines a Simple Mail Transport Protocol (SMTP) extension whereby an SMTP client may indicate an authentication mechanism to the server, perform an authentication protocol exchange, and optionally negotiate a security layer for subsequent protocol interactions during this session. This extension includes a profile of the Simple Authentication and Security Layer (SASL) for SMTP. This document obsoletes RFC 2554. [STANDARDS-TRACK]

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