Fedora 10
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Install/Configure Postfix
2008/12/14
  Install and Configure Postfix for SMTP Server.

[1] Install and Configure Postfix
[root@mail ~]#
yum -y install postfix


[root@mail ~]#
vi /etc/postfix/main.cf


# line 76: uncomment and specify hostname

myhostname =
mail.srv.world


# line 83: uncomment and specify domain name

mydomain =
srv.world


# line 99: uncomment

myorigin = $mydomain

# line 116: change

inet_interfaces =
all


# line 161: add

mydestination = $myhostname, localhost.$mydomain, localhost
, $mydomain


# line 261: uncomment and specify your LAN

mynetworks = 127.0.0.0/8,
192.168.0.0/24


# line 416: uncomment (use Maildir)

home_mailbox = Maildir/

# line 542: uncomment, line 543: add

header_checks = regexp:/etc/postfix/header_checks
body_checks = regexp:/etc/postfix/body_checks


# add at the bottom: limit an email size 5M

message_size_limit = 5242880

# limit mailbox 100M

mailbox_size_limit = 104857600


# for SMTP-Auth setting

smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
smtpd_sasl_local_domain = $myhostname
smtpd_recipient_restrictions = permit_mynetworks, permit_auth_destination, permit_sasl_authenticated, reject


[root@mail ~]#
vi /etc/postfix/header_checks


# add at the head

# reject if email address is empty

/^From:.*<#.*@.*>/ REJECT
/^Return-Path:.*<#.*@.*>/ REJECT
# hide Received line

/^Received:/ IGNORE


[root@mail ~]#
vi /etc/postfix/body_checks


# reject if includes 'example.com' in mail body

/^(|[^>].*)example.com/ REJECT


[root@mail ~]#
/etc/rc.d/init.d/sendmail stop

Shutting down sm-client:
[  OK  ]

Shutting down sendmail:
[  OK  ]

[root@mail ~]#
chkconfig sendmail off

[root@mail ~]#
alternatives --config mta


There are 2 programs which provide 'mta'.

Selection      Command
-----------------------------------------------
*+ 1
  /usr/sbin/sendmail.sendmail

2
  /usr/sbin/sendmail.postfix


Enter to keep the current selection[+], or type selection number:
2


[root@mail ~]#
/etc/rc.d/init.d/postfix start

Starting postfix:
[  OK  ]

[root@mail ~]#
/etc/rc.d/init.d/saslauthd start

Starting saslauthd:
[  OK  ]

[root@mail ~]#
chkconfig postfix on

[root@mail ~]#
chkconfig saslauthd on
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