SMTP Service Extension for Authentication, March 1999
- File formats:
- PROPOSED STANDARD
- Obsoleted by:
- RFC 4954
- J. Myers
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This document defines an SMTP service extension [ESMTP] 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. [STANDARDS-TRACK]
For the definition of Status, see RFC 2026.
For the definition of Stream, see RFC 8729.