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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.
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 e-mail spoofing ETRN MTA MUA ODMR POP