RFC 2920 · INTERNET STANDARD · 2000
SUN · 14 JUN 2026
SMTP Service Extension for Command Pipelining
Overview
RFC 2920, “SMTP Service Extension for Command Pipelining”, is an Internet Standard document published in September 2000 by N. Freed. It obsoletes RFC 2197. The canonical text is published by the RFC Editor.
Abstract
This memo defines an extension to the Simple Mail Transfer Protocol (SMTP) service whereby a server can indicate the extent of its ability to accept multiple commands in a single Transmission Control Protocol (TCP) send operation. [STANDARDS-TRACK]
What “Internet Standard” means
A mature, widely-implemented specification that has completed the full IETF standards process — the highest maturity level on the standards track.
Read this RFC
The canonical text of RFC 2920 is hosted at rfc-editor.org. Available in TXT,HTML.
Relationships to other RFCs
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