Set up Postfix + Dovecot email server in RHEL6.4

Set up the Postfix + Dovecot email server under RHEL6.4. For details, refer to the installation and basic configuration of the Postfix email service in CentOS6.4.

Set up the Postfix + Dovecot email server under RHEL6.4.

Related reading:

Postfix mail service installation and basic configuration http://www.linuxidc.com/Linux/2013-08/88977.htm under CentOS 6.4

Install the mail server Postfix in CentOS 5.5Http://www.linuxidc.com/Linux/2012-05/60010.htm

Build a Postfix Mail Server http://www.linuxidc.com/Linux/2012-12/77167.htm for Red Hat Enterprise Linux 5.4

Postfix (certified) http://www.linuxidc.com/Linux/2012-09/70527.htm for Secure Mail Server in Linux

Lab requirement: Build a mail server (192.168.100.1) that can receive and send emails for the company to provide services to its employees. The Company domain name is linuxidc.com.

1. Modify the mx mail exchange record on the DNS server (192.168.100.2) to ensure that the client can resolve the mail server address

1. Modify the DNS region File

# Vim/var/named/linuxidc.com. zone

$ TTL 3 H

@ In soa linuxidc.com. root.linuxidc.com .(

2014042601; serial

1D; refresh

1 H; retry

1 W; expire

3 H); minimum

NS dns1.linuxidc.com.

In mx 10 mail.linuxidc.com.

Dns1 in a 192.168.100.2

Mail in a 192.168.100.1

......

 

2. Restart the service

# Service named restart

 

3. Check whether the client can resolve the issue.

# Host-t mx linuxidc.com 192.168.100.2 // query the MX record of the Target Domain

Using domain server:

Name: 192.168.100.2

Address: 192.168.100.2 #53

Aliases:

Linuxidc.com mail is handled by 10 mail.linuxidc.com.

 

# Host mail.linuxidc.com 192.168.100.2 // view the resolution result of the email server

Using domain server:

Name: 192.168.100.2

Address: 192.168.100.2 #53

Aliases:

Mail.linuxidc.com has address 192.168.100.1

 

2. Set up a postfix Mail Server

1. install the software package

# Yum-y install postfix

 

2. Modify the master configuration file

[Root @ mail ~] # Cd/etc/postfix/

# Postconf-n> tmp.txt // export non-default configuration

# Mv main. cf main. cf. bak

# Mv tmp.txt main. cf

# Vim main. cf

...

9 # inet_interfaces = localhost // listener Port

22 myhostname = mail.linuxidc.com // Mail Server Host Name

23 mydomain = linuxidc.com // region of the email server

24 myorigin = $ mydomain // sender's DNS suffix

25 mydestination = $ mydomain // specify the mail that the Postfix allows to process

26 home_mailbox = Maildir // mail type

 

3. Check the syntax to start the service.

# Postfix check

# Service postfix start

# Chkconfig postfix on

# Netstat-tulnp | grep: 25 // send mail using SMTP protocol

Tcp 0 0 0.0.0.0: 25 0.0.0.0: * LISTEN 3564/master

Tcp 0 0: 25: * LISTEN 3564/master

 

4. Create a mailbox user // The Mail User is a system user by default.

# Useradd damao

# Echo 123456 | passwd -- stdin damao

# Useradd tom

# Echo 123456 | passwd -- stdin tom

 

5. Test the mail sending Function

# Telnet mail.linuxidc.com 25

Trying 192.168.100.1...

Connected to mail.linuxidc.com.

Escape character is '^]'.

220 mail.linuxidc.com ESMTP Postfix

Helo localhost // advertise the client

250 mail.linuxidc.com

Mail from: damao@linuxidc.com // mail sender

250 2.1.0 OK

Rcpt to: tom@linuxidc.com // email recipient

250 2.1.5 OK

Data // email body

354 End data .

Subject: Test mail // subject

Hello, tom // email content

. // Independent. indicates that the email has ended.

250 2.0.0 OK: queued as 9B6463FD97

Quit // exit

221 2.0.0 Bye

Connection closed by foreign host.

 

6. verify whether the email is successfully sent.

# Ls/home/tom/Maildir/new/

1398426202.v803ibf420m185454.mail.linuxidc.com

# Cat/home/tom/Maildir/new/1398426202.v803ibf420m185454.mail.linuxidc.com

Return-Path:

X-Original-To: tom@linuxidc.com

Delivered-To: tom@linuxidc.com

Received: from localhost (unknown [192.168.100.1])

By mail.linuxidc.com (Postfix) with SMTP id 9B6463FD97

For ; Fri, 25 Apr 2014 23:00:32-0700 (PDT)

Subject: Test mail

Message-Id: <20140426060137.9B6463FD97@mail.linuxidc.com>

Date: Fri, 25 Apr 2014 23:00:32-0700 (PDT)

From: damao@linuxidc.com

To: undisclosed-recipients :;

 

Hello, tom

For more details, refer to the highlights on the next page.: Http://www.linuxidc.com/Linux/2014-05/101164p2.htm