eSecurity Planet: Software & Internet Security Trends, Virus Alerts

November 28, 2009

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SMTP

Last modified: Friday, July 30, 2004

(pronounced as separate letters) Short for Simple Mail Transfer Protocol, a protocol for sending e-mail messages between servers. Most e-mail systems that send mail over the Internet use SMTP to send messages from one server to another; the messages can then be retrieved with an e-mail client using either POP or IMAP. In addition, SMTP is generally used to send messages from a mail client to a mail server. This is why you need to specify both the POP or IMAP server and the SMTP server when you configure your e-mail application.

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Yahoo!'s SMTP page
Yahoo!'s directory of Simple Mail Transfer Protocol (SMTP).

RFC 1123
One of the most important RFCs, covering requirements for Internet client software, including Telnet, FTP, SMTP, and DNS.

SMTP RFC
Request for Comments document on Simple Mail Transfer Protocol (SMTP).

SMTP service extension for delivery status notifications RFC
Request for Comments document on SMTP service extension for delivery status notifications.

SMTP service extensions RFC
Request for Comments document on SMTP service extensions.

Related Categories

Electronic Mail

Internet Protocols

Related Terms

e-mail