RFC 821

E35264
Internet standard Request for Comments

RFC 821 is the original Internet standard that formally defined the Simple Mail Transfer Protocol (SMTP) for electronic mail transmission.

Statements (51)
Predicate Object
instanceOf Internet standard →
Request for Comments →
abbreviation SMTP →
appliesTo Internet →
TCP/IP networks →
area Internet protocols →
email →
author Jonathan B. Postel →
category Standards Track →
commandSetIncludes DATA →
EXPN →
HELO →
HELP →
MAIL →
NOOP →
QUIT →
RCPT →
RSET →
VRFY →
defaultPort 25 →
defines SMTP session model →
commands for SMTP →
mail transfer procedures →
replies for SMTP →
use of TCP port 25 for SMTP →
definesProtocol Simple Mail Transfer Protocol →
definesRole SMTP gateway →
SMTP receiver →
SMTP relay →
SMTP sender →
doesNotSpecify message format →
editor Jonathan B. Postel →
focusesOn electronic mail transmission →
message transfer between mail servers →
influenced RFC 2821 →
RFC 5321 →
language English →
messageFormatSpecifiedBy RFC 822 →
networkModelLayer application layer →
obsoletedBy RFC 2821 →
RFC 5321 →
protocolType application-layer protocol →
publicationYear 1982 →
publishedBy Internet Activities Board →
Internet Configuration Control Board →
Internet Engineering Task Force →
publishedIn August 1982 →
standardizes SMTP →
status Obsoleted →
title Simple Mail Transfer Protocol →
transportProtocol TCP →
Referenced by (3)
Subject (surface form when different) Predicate
RFC 5321 →
obsoletes
SMTP →
originallyDefinedIn
SMTP →
predecessor
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