SMTP Mail Transaction Process
(Page 1 of 3)
The delivery of e-mail message begins with the establishment of an SMTP session between the devices sending and receiving the message. The SMTP sender initiates a TCP connection to the SMTP receiver, and then sends a HELO or EHLO command, to which the receiver responds. Assuming there are no problems, the session is then established and ready for actual e-mail message transactions.
The SMTP mail transaction process itself consists of three steps:
That's it! So you can see that the word Simple in Simple Mail Transfer Protocol definitely has at least some merit. Especially when compared with other protocols that claim to be simple, such as SNMP. J
Home - Table Of Contents - Contact Us
The TCP/IP Guide (http://www.TCPIPGuide.com)
Version 3.0 - Version Date: September 20, 2005
© Copyright 2001-2005 Charles M. Kozierok. All Rights Reserved.
Not responsible for any loss resulting from the use of this site.