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2025-01-06T23:24:22Z

Created page with "'''SMTP''' (''Simple Mail Transfer Protocol'') is one of the most commonly used protocols for sending electronic mail on the Internet. This protocol is use..."

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'''[[SMTP]]''' (''[[Simple Mail Transfer Protocol]]'') is one of the most commonly used [[protocols]] for sending [[electronic mail]] on the [[Internet]]. This protocol is used to send data from the sender's [[electronic mail]] computer to the recipient's [[electronic mail]] server.

This protocol emerged due to the design of the [[electronic mail]] system, which requires an [[electronic mail]] server to temporarily hold the [[electronic mail]] until it is retrieved by the rightful recipient.

== Related Protocols ==

* [[POP3]] protocol for retrieving [[electronic mail]] from a server.
* [[IMAP]] similar to POP3 but with more comprehensive features.

== Example Transaction ==
S = Server
C = Client

C : (connection initialization)
S : 220 Wikipedia ESMTP server ready
C : mail from: user@wikipedia.org
S : 250 mail ok
C : rcpt to: wikipedia@wikipedia.org
S : 250 rcpt ok
C : data
S : 354 end data with CRLF.CRLF
C : -- email data --
C : CRLF.CRLF
S : 250 data ok
C : QUIT
S : 221 bye

== External links ==

* [RFC 821 SIMPLE MAIL TRANSFER PROTOCOL](http://www.ietf.org/rfc/rfc0821.txt)
* [RFC 821 STANDARD FOR THE FORMAT OF ARPA INTERNET TEXT MESSAGES](http://www.ietf.org/rfc/rfc0821.txt)

==Interesting Links==

* [[Postfix (en)]]
* [[Postfix: Installation (en)]]
* [[Raspbian: Postfix Installation (en)]]
* [[SchoolOnffLine: Postfix SMTP Server Installation (en)]]
* [[SMEOnffLine: Postfix SMTP Server Installation (en)]]
* [[Block Spam Using Postfix (en)]]
* [[Block Spam Using Postfix and Bogofilter (en)]]
* [[Postfix: Delivery Speed Control (en)]]
* [[Postfix: IPv6 (en)]]
* [[Postfix: SMTP Authentication for Clients (en)]]
* [[linux: mailx command (en)]]

SERVER: SMTP (en) - Revision history

Unknown user: Created page with "'''SMTP''' (''Simple Mail Transfer Protocol'') is one of the most commonly used protocols for sending electronic mail on the Internet. This protocol is use..."