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Richten Sie einen Mailserver mit Postfix, Dovecot und SquirrelMail in CentOS ein


[root@server ~]# yum remove sendmail

Voraussetzungen:

  • Der Mailserver sollte einen gültigen MX-Eintrag im DNS-Server enthalten. Navigieren Sie zu diesem Link, um zu erfahren, wie Sie einen DNS-Server einrichten.
  • Firewall und SELinux sollten deaktiviert sein.
[root@server ~]# service iptables stop
[root@server ~]# service ip6tables stop
[root@server ~]# chkconfig iptables off
[root@server ~]# chkconfig ip6tables off
[root@server ~]# vi /etc/selinux/config
This file controls the state of SELinux on the system.
SELINUX= can take one of these three values:
    enforcing - SELinux security policy is enforced.
    permissive - SELinux prints warnings instead of enforcing.
    disabled - No SELinux policy is loaded.
SELINUX=disabled
# SELINUXTYPE= can take one of these two values:
    targeted - Targeted processes are protected,
    mls - Multi Level Security protection.
SELINUXTYPE=targeted

Starten Sie den Server neu.

Szenario

  • Hostname    =server.ostechnix.com
  • IP-Adresse    = 192.168.1.200/24

Installation

[root@server ~]# yum install postfix

Aufbau

[root@server ~]# vi /etc/postfix/main.cf
myhostname = server.ostechnix.com ##line no 75 - uncomment and enter your host name
mydomain = ostechnix.com  ##line no 83 - uncomment and enter your domain name 
myorigin = $mydomain  ##line no 99 - uncomment
inet_interfaces = all  ##line no 116 - change to all
mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain  ##line no 164 - add $domain at the end
mynetworks = 192.168.1.0/24, 127.0.0.0/8  ##line no 264 - uncomment and add your network range
home_mailbox = Maildir/  ##line no 419 - uncomment
[root@server ~]# service postfix start
Starting postfix:                                          [  OK  ]
[root@server ~]# chkconfig postfix on

Testen Sie Postfix

[root@server ~]# telnet localhost smtp
Trying ::1...
Connected to localhost.
Escape character is '^]'.
220 server.ostechnix.com ESMTP Postfix
ehlo localhost
250-server.ostechnix.com
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
mail from:<user1>
250 2.1.0 Ok
rcpt to:<user1>
250 2.1.5 Ok
data
354 End data with <CR><LF>.<CR><LF>
test
.
250 2.0.0 Ok: queued as 117113FF18
quit
221 2.0.0 Bye
Connection closed by foreign host.

Überprüfen Sie die E-Mails

[root@server ~]# cd /home/user1/Maildir/new/
[root@server new]# ls
1360236956.Vfd00I35afM181256.server.ostechnix.com
[root@server new]# cat 1360236956.Vfd00I35afM181256.server.ostechnix.com 
Return-Path: <user1@ostechnix.com>
X-Original-To: user1
Delivered-To: user1@ostechnix.com
Received: from localhost (localhost [IPv6:::1])
 by server.ostechnix.com (Postfix) with ESMTP id 117113FF18
 for <user1>; Thu,  7 Feb 2013 17:05:32 +0530 (IST)
Message-Id: <20130207113547.117113FF18@server.ostechnix.com>
Date: Thu,  7 Feb 2013 17:05:32 +0530 (IST)
From: user1@ostechnix.com
To: undisclosed-recipients:;
test

Installieren Sie Dovecot

[root@server ~]# yum install dovecot

Konfigurieren Sie Dovecot

[root@server ~]# vi /etc/dovecot/dovecot.conf
protocols = imap pop3 lmtp
[root@server ~]# vi /etc/dovecot/conf.d/10-mail.conf
mail_location = maildir:~/Maildir  ##line no 24 - uncomment
[root@server ~]# vi /etc/dovecot/conf.d/10-auth.conf
disable_plaintext_auth = no  ##line no 9 - uncomment and change from yes to no.
auth_mechanisms = plain login  ##line no 97 - add the text "login"
unix_listener auth-userdb {
    #mode = 0600
    user = postfix  ##line no 83 - uncomment and enter postfix
    group = postfix  ##line no 84 - uncomment and enter postfix
[root@server ~]# service dovecot start
Starting Dovecot Imap:                                     [  OK  ]
[root@server ~]# chkconfig dovecot on

Testen Sie den Taubenschlag

[root@server ~]# telnet localhost pop3
Trying ::1...
Connected to localhost.
Escape character is '^]'.
+OK Dovecot ready.
user user1
+OK
pass user1
+OK Logged in.
list
+OK 1 messages:
1 428
.
retr 1
+OK 428 octets
Return-Path: <user1@ostechnix.com>
X-Original-To: user1
Delivered-To: user1@ostechnix.com
Received: from localhost (localhost [IPv6:::1])
 by server.ostechnix.com (Postfix) with ESMTP id 117113FF18
 for <user1>; Thu,  7 Feb 2013 17:05:32 +0530 (IST)
Message-Id: <20130207113547.117113FF18@server.ostechnix.com>
Date: Thu,  7 Feb 2013 17:05:32 +0530 (IST)
From: user1@ostechnix.com
To: undisclosed-recipients:;
test
.
quit 
+OK Logging out.
Connection closed by foreign host.
[root@server ~]#

Installieren Sie Squirrelmail

[root@server ~]# wget http://dl.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm
[root@server ~]# rpm -ivh epel-release-6-8.noarch.rpm 
[root@server ~]# yum install squirrelmail
[root@server ~]# service httpd start
Starting httpd:                                            [  OK  ]
[root@server ~]# chkconfig httpd on
[root@server ~]#

Konfigurieren Sie Squirrelmail

[root@server ~]# cd /usr/share/squirrelmail/config/
[root@server config]# ./conf.pl 
SquirrelMail Configuration : Read: config.php (1.4.0)
---------------------------------------------------------
Main Menu --
1.  Organization Preferences
2.  Server Settings
3.  Folder Defaults
4.  General Options
5.  Themes
6.  Address Books
7.  Message of the Day (MOTD)
8.  Plugins
9.  Database
10. Languages
D.  Set pre-defined settings for specific IMAP servers
C   Turn color off
S   Save data
Q   Quit
Command >>1

Wählen Sie Option 1 und legen Sie die Organisationsdetails fest.

SquirrelMail Configuration : Read: config.php (1.4.0)
---------------------------------------------------------
Organization Preferences
1.  Organization Name      : Ostechnix
2.  Organization Logo      : ../images/sm_logo.png
3.  Org. Logo Width/Height : (308/111)
4.  Organization Title     : Welcome to Ostechnix webmail
5.  Signout Page           : 
6.  Top Frame              : _top
7.  Provider link          : https://ostechnix.com
8.  Provider name          : Ostechnix
R   Return to Main Menu
C   Turn color off
S   Save data
Q   Quit
Command >>R

Drücken Sie R, um zum Hauptmenü zurückzukehren und wählen Sie Option 2. Geben Sie Ihren Domainnamen ein und wählen Sie dovecot im Sendmail- oder SMTP-Parameter aus.

SquirrelMail Configuration : Read: config.php (1.4.0)
---------------------------------------------------------
Server Settings
General
-------
1.  Domain                 : ostechnix.com
2.  Invert Time            : false
3.  Sendmail or SMTP       : SMTP
A.  Update IMAP Settings   : localhost:143 (uw)
B.  Update SMTP Settings   : localhost:25
R   Return to Main Menu
C   Turn color off
S   Save data
Q   Quit
Command >> S
[root@server ~]# vi /etc/httpd/conf/httpd.conf
Alias /squirrelmail /usr/share/squirrelmail
<Directory /usr/share/squirrelmail>
    Options Indexes FollowSymLinks
    RewriteEngine On
    AllowOverride All
    DirectoryIndex index.php
    Order allow,deny
    Allow from all
</Directory>
[root@server ~]# service httpd restart
Stopping httpd:                                            [  OK  ]
Starting httpd:                                            [  OK  ]
[root@server ~]#

Benutzer erstellen

[root@server ~]# useradd user1
[root@server ~]# useradd user2
[root@server ~]# passwd user1
[root@server ~]# passwd user2
http://serveripaddress/webmail
http://yourdomainname/webmail