Mail system Postfix

Smtp:simple Mail Tansfer Protocol

Can implement routing functions, such as from one user to another user

esmtp:extended

Pop3:post Office Protocol

Imap4:internet Mail Access Protocol

SMTP (25/TCP)

Message transfer: MT

Mail delivery: MD

Mail User: MU

Mail users agent: MUA Mail user agent

Message transfer agent: MTA Mail tansfer Agent

Mail delivery Agent: MDA mail delivery Agent

Mail Retrieval agent: MRA Mail Retrieval Agent

MUA--->MTA: Using the SMTP protocol

SMTPD message transport is divided into two categories:

LMTP: Local Mail Transfer Protocol

Call the local SMTP client and then send the SMTPD to the message to the other party

Open relay: Opening relay

Sasl:simple authintication secure layer, simple authentication security layers

Ldap:lightweight Directory Access Protocol

Virtual User: A digital ID that only a user accesses a service

MTA: Mail transfer agent software:

SendMail: Configuration file Syntax (M4 written), combined with suid

QMail: Send very fast, 2 orders of magnitude in SendMail

Postfix: Modular design, not using suid, safe, sendmail compatible, high efficiency, almost 4 times times higher than SendMail

Exim: Simple configuration Syntax, Cambridge University open Source project

Exchange: There is an asynchronous messaging collaboration platform

SASL:SMTPD User authentication function implementation

SYRUS-SASL V2 Version

Courier--authlib: Generally used to do SASL authentication mechanism, more powerful, and flexible

MDA: implementation of mail delivery

Procmail (used in sendmail)

Maildrop

Implementation of the Mra:pop3,ima protocol

Cyrus-imap

Dovecot: Simple syntax and powerful features

MUA: Mail client

Outlook,foxmail,thunderbird,evolution,mutt (Professional-level file interface)

Webmail:web Interface Mail Implementation

SquirrelMail

Openwebmail

Extmail (Extman)

Emos,centos Custom Version

Smtps

Pop3s

Imaps

Experimental implementation:

Email party: Postfix + SASL (courier-authlib) + MySQL

Mail party: Dovecot + MySQL

Webmail:extmail + Extman + httpd

Installation configuration postfix:

# groupadd -g 2525 postfix# useradd -g postfix -u 2525 -s  /sbin/nologin -m postfix# groupadd -g 2526 postdrop# useradd -g  postdrop -u 2526 -s /sbin/nologin -M postdrop# tar zxvf  postfix-2.9.3.tar.gz# cd postfix-2.9.3# make makefiles  ' CCARGS=-DHAS_MYSQL -I/ Usr/include/mysql -duse_sasl_auth -duse_cyrus_sasl -i/usr/include/sasl  -duse_tls   '   ' AUXLIBS=-L/USR/LIB/MYSQL -LMYSQLCLIENT -LZ -LM -L/USR/LIB/SASL2 -LSASL2   -lssl -lcrypto ' # make# make install# make makefiles  ' CCARGS=- Dhas_mysql -i/usr/local/mysql/include -duse_sasl_auth -duse_cyrus_sasl -i/usr/include/sasl   -DUSE_TLS  '   ' auxlibs=-l/usr/local/mysql/lib -lmysqlclient -lz -lm -l /usr/lib/sasl2 -lsasL2  -lssl -lcrypto ' 

This article is from the "Wei Zhenping" blog, please be sure to keep this source http://leozhenping.blog.51cto.com/10043183/1665665

Mail system Postfix