Email Tutorials - Herong's Tutorial Examples - v1.03, by Herong Yang
What Is Postfix
This section provides a quick description on Postfix, a free and open-source Mail Transport Agent (MTA) that routes and delivers electronic mail on Linux systems.
What Is Postfix? Postfix is a free and open-source Message Transport Agent (MTA) that routes and delivers electronic mail on Linux systems. It's a replacement of the old "sendmail" daemon program.
Here is the official description of Postfix from postfix.org: "What is Postfix? It is Wietse Venema's mail server that started life at IBM research as an alternative to the widely-used Sendmail program. Now at Google, Wietse continues to support Postfix. Postfix attempts to be fast, easy to administer, and secure. The outside has a definite Sendmail-ish flavor, but the inside is completely different."
Postfix is actually more than a MTA. It is also a Message Submission Agent (MSA), which allows Message User Agent (MUA) tools to submit email messages.
Postfix is also a Message Delivery Agent (MDA), which delivers email messages to mailboxes on the local system.
See more information, visit Postfix Website at postfix.org.
Table of Contents
►Postfix - Mail Transport Agent (MTA)
Install and Configure Postfix on CentOS
Test Postfix Server with "telnet" Client
SMTP Submission Service on Port 587 in Postfix
Archive Emails using "always_bcc" Setting in Postfix
Move /var/spool/postfix to New Location
"postconf" Command to Manage Postfix Configuration
Turn on Postfix Server Logging for Troubleshooting
SSL/TLS Secure Connections with Postfix Server
Dovecot - IMAP and POP3 Server
SSL/TLS Secure Connections with Dovecot Server
Email Client Tools - Mail User Agents (MUA)