U.S. flag   An official website of the United States government
Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock (Dot gov) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

A  |  B  |  C  |  D  |  E  |  F  |  G  |  H  |  I  |  J  |  K  |  L  |  M  |  N  |  O  |  P  |  Q  |  R  |  S  |  T  |  U  |  V  |  W  |  X  |  Y  |  Z

Simple Mail Transfer Protocol (SMTP)

Definition(s):

  An MTA protocol defined by IETF RFC 2821. SMTP is the most commonly used MTA protocol.
Source(s):
NIST SP 800-45 Version 2

  the primary protocol used to transfer electronic mail messages on the Internet.
Source(s):
NIST SP 1800-16B under Simple Mail Transfer Protocol from NISTIR 7387
NIST SP 1800-16C under Simple Mail Transfer Protocol from NISTIR 7387
NIST SP 1800-16D from NISTIR 7387
NISTIR 7250 under Simple Mail Transfer Protocol
NISTIR 7387 under Simple Mail Transfer Protocol