Mail Server Configuration Using postfix

Step 1 : Install the packages for mail server
[root#] yum install postfix*

Step 2 :  Verify the packages
[root#] rpmquery -qa | grep postfix
o/p:
postfix-2.6.6-2.el6.i686

Step 3 : On the postfix service at boot time
[root#]chkconfig postfix on

Step 4 : Open the configuration file /etc/postfix/main.cf

1. Go To Line No 75
Uncomment it
myhostname = server.tyit.com

2. Go To Line No 98
Uncomment it
myorigin = $myhostname

3. Go To Line No 113
Uncomment it
inet_interfaces = all

4. Go To Line No 116
Comment it
#inet_interfaces = localhost

5. Go To Line No 264
Uncomment it
mynetworks = 192.168.2.111/28, 127.0.0.0/8

6. Go To Line No 265
Uncomment it
mynetworks = $config_directory/mynetworks

7. Go To Line No 266
Uncomment it
mynetworks = hash:/etc/postfix/network_table

8. Go To Line No 426
Uncomment it
mail_spool_directory = /var/spool/mail

** Save the file and come back to terminal


Step 5 : Stop the sendmail
[root#] service sendmail stop
[root#] service sendmail status

Step 6 : Start and restart postfix
[root#] service postfix start
[root#] service postfix restart

Step 7 : Stop the firewall
[root#] service iptables stop


Step 8 : Sending a mail to user "testB"
[root#] mail   testB@server.tyit.com
o/p:
Subject: PostTestmail
Hi m testing the mail
[CTRL + D]
EOT



service named restart

[root#]host server.tyit.com