Postfix mail system

First, experimental Steps and Results

First Stage

Deploying the Postfix messaging System

Hostname	OS	Ip	Software
Www.benet.com	CentOS-6.5	10.0.0.2	Yum install-y CYRUS-SASL Cyrus-sasl-devel Postfix-2.9.4.tar.gz/dovecot-2.1.10.tar.gz

Shut down firewall: Service iptables stop

Pre-compilation configuration, uninstalling SendMail, installing the Cyrus package

[email protected]/]# Yum remove-y sendmail

[email protected]/]# Yum install-y CYRUS-SASL cyrus-sasl-devel

Compiling and installing Postfix

[Email protected]/]# tar zxvf postfix-2.9.4.tar.gz-c/usr/src/

[Email protected]/]# cd/usr/src/postfix-2.9.4/

Use the Make makefiles command to adjust parameters before compiling so that Postfix supports SASL authentication and querying the MySQL database

[[email protected] postfix-2.9.4]# make makefiles ' CCARGS=-DUSE_SASL_AUTH-DUSE_CYRUS_SASL-I/USR/INCLUDE/SASL ' AUXLIBS=-L/USR/LIB/SASL2-LSASL2 '

[[email protected] postfix-2.9.4]# make && make install

Postconf–a View Supported authentication methods

Postconf–n display items that differ from the default configuration

Postfix Start Open Postfix

Postfix Check Configuration

Postfixreload Reload

Simplify configuration files

[Email protected] ~]# postconf-n > tmp

[Email protected] ~]# cd/etc/postfix/

[Email protected] postfix]# MV MAIN.CF Main.cf.bak

[Email protected] postfix]# mv ~/tmp./main.cf

[Email protected] postfix]# vim MAIN.CF

Inet_interfaces = 10.0.0.2, 127.0.0.1

Myhostname = www.benet.com

MyDomain = benet.com

Myorigin = $mydomain

Mydestination = $mydomain, $myhostname

Home_mailbox = maildir/

[[email protected] ~]# postfix start

Postfix/postfix-script:starting the Postfix mail system

Create a mail user, user group

[Email protected] ~]# Groupadd mailusers

[Email protected] ~]# useradd-s/sbin/nologin-g mailusers mail1

[Email protected] ~]# useradd-s/sbin/nologin-g mailusers mail2

[Email protected] ~]# passwd mail1

[Email protected] ~]# passwd MAIL2

[[Email protected] ~]# Telnet www.benet.com 25

Trying 10.0.0.2 ...

Connected to www.benet.com.

Escape character is ' ^] '.

Mail.benet.com ESMTP Postfix

HELO www.benet.com Client Host Address

Mail.benet.com

Mail From:[email protected] Sender address

2.1.0 Ok

RCPT To:[email protected] recipient address

2.1.5 Ok

Data to be transferred

354 END data with <CR><LF>.<CR><LF>

Subjec:a Test Mail Set right-click Topic

T323-y2

. Point number is over.

2.0.0 ok:queued as 5624662052F

QUIT

221 2.0.0 Bye

Connection closed by foreign host.

Phase II

Compiling and installing Dovecot

[Email protected]/]# useradd-m-s/sbin/nologin dovecot

[Email protected]/]# useradd-m-s/sbin/nologin dovenull

[Email protected]/]# tar zxvf dovecot-2.1.10.tar.gz-c/usr/src/

[Email protected] dovecot-2.1.10]#/configure--sysconfdir=/etc/

[[email protected] dovecot-2.1.10]# make && make install

[Email protected]/]# Cp/usr/src/dovecot-2.1.10/doc/dovecot-initd.sh/etc/init.d/dovecot

[Email protected]/]# chmod +x/etc/init.d/dovecot

[Email protected]/]# chkconfig--add dovecot

[Email protected]/]# cp-r/usr/local/share/doc/dovecot/example-config/*/etc/dovecot/

[Email protected]/]# vim/etc/dovecot/dovecot.conf

!include conf.d/10-auth.conf

SSL = no disable SSL mechanism

Disable_plaintext_auth = no allow plaintext password

Mail_location = Maildir:~/maildir Set the message storage format and location

Create a PAM Certification file

[Email protected]/]# Vim/etc/pam.d/dovecot

Auth Required pam_nologin.so

Auth include System-auth

Account include System-auth

Session include System-auth

[[email protected]/]#/etc/init.d/dovecot start

Starting Dovecot.

[[Email protected]/]# Telnet www.benet.com 110

Trying 10.0.0.2 ...

Connected to www.benet.com.

Escape character is ' ^] '.

+ok Dovecot ready.

User MAIL2 username

+ok

Pass Aptech Password

+ok logged in.

List Mailing Lists

+ok 1 messages:

1 427

.

RETR 1 Read the first message

+ok 427 octets

Return-path: <[email protected]>

x-original-to: [Email protected]

delivered-to: [Email protected]

Received:from www.benet.com (www.benet.com [10.0.0.2])

by Mail.benet.com (Postfix) with SMTP ID 5624662052F

For <[email protected]>; Wed, 08:26:32 +0800 (CST)

Subjec:a Test Mail

Message-id: <[email protected]>

date:wed, 08:26:32 +0800 (CST)

From: [Email protected]

T323-y2 Mail Content

.

Quit

+ok Logging out.

Connection closed by foreign host.

Phase III

Set up SMTP Authentication Service

[Email protected] ~]# vim/usr/lib64/sasl2/smtpd.conf

Pwcheck_method:saslauth

[[email protected] ~]#/ETC/INIT.D/SASLAUTHD start

Starting SASLAUTHD: [OK]

[Email protected] ~]# chkconfig--level SASLAUTHD on

Modify the main.conf configuration file, add SMTP authentication-related configuration parameters, and reload the configuration

[Email protected] ~]# VIM/ETC/POSTFIX/MAIN.CF

Smtpd_sasl_auth_enable = yes

Smtpd_sasl_security_options = noanonymous

Mynetworks = 127.0.0.1

Smtpd_recipient_restrictions =

Permit_mynetworks,

Permit_sasl_authenticated,

Reject_unauth_destination

[Email protected] ~]# Postfix Reload

Postfix/postfix-script:refreshing the Postfix mail system

Test SMTP Authentication

Authentication requires a user password, the encrypted string character encoding format is BASE64

Get password: printf "Zhangsan" | OpenSSL base64 (user name Zhangsan)

printf "Aptech" | OpenSSL base64 (password Aptech)

[[Email protected] ~]# Telnet www.benet.com 25

Trying 10.0.0.2 ...

Connected to www.benet.com.

Escape character is ' ^] '.

Mail.benet.com ESMTP Postfix

EHLO www.benet.com

250-mail.benet.com

250-pipelining

250-size 10240000

250-vrfy

250-etrn

250-auth PLAIN LOGIN cram-md5 digest-md5

250-enhancedstatuscodes

250-8bitmime

DSN

AUTH LOGIN

334 Vxnlcm5hbwu6

Bwfpbde=

334 Ugfzc3dvcmq6

Yxb0zwno

235 2.7.0 Authentication Successful

MAIL From:[email protected]

2.1.0 Ok

RCPT To:[email protected]

2.1.5 Ok

DATA

354 END data with <CR><LF>.<CR><LF>

Postfix

.

2.0.0 ok:queued as b0b69620537

QUIT

221 2.0.0 Bye

Connection closed by foreign host.

Postfix mail system