Ubuntu 12.04
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Install\Configure Postfix
2012/05/10
 
Install Postfix to configure SMTP Server. This example shows to configure SMTP-Auth to use Dovecot's SASL function.
[1] Install and Configure Postfix
root@mail:~#
aptitude -y install postfix postfix-tls sasl2-bin
# Enter

# select 'No Configuration' (configure manually)


root@mail:~#
cp /usr/lib/postfix/main.cf /etc/postfix/main.cf

root@mail:~#
vi /etc/postfix/main.cf
# line 59: uncomment

mail_owner = postfix
# line 76: uncomment and specify hostname

myhostname =
mail.srv.world
# line 83: uncomment and specify domain name

mydomain =
srv.world
# line 104: uncomment

myorigin = $mydomain
# line 118: uncomment

inet_interfaces = all
# line 166: uncomment

mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain
# line 209: uncomment

local_recipient_maps = unix:passwd.byname $alias_maps
# line 268: uncomment and specify your LAN

mynetworks = 127.0.0.0/8,
10.0.0.0/24
# line 388: uncomment

alias_maps = hash:/etc/aliases
# line 399: uncomment

alias_database = hash:/etc/aliases
# line 421: uncomment (use Maildir)

home_mailbox = Maildir/
# line 531: uncomment

header_checks = regexp:/etc/postfix/header_checks
# add: mail body checking

body_checks = regexp:/etc/postfix/body_checks
# line 557: make it comment and add below

#
smtpd_banner = $myhostname ESMTP $mail_name (@@DISTRO@@)
smtpd_banner = $myhostname ESMTP
# line 631: add

sendmail_path =
/usr/sbin/postfix
# line 636: add

newaliases_path =
/usr/bin/newaliases
# line 641: add

mailq_path =
/usr/bin/mailq
# line 647: add

setgid_group =
postdrop
# line 651: make it comment

#
html_directory =
# line 655: make it comment

#
manpage_directory =
# line 660: make it comment

#
sample_directory =
# line 664: make it comment

#
readme_directory =
# add at the lasdt line: limit an email size 10M

message_size_limit = 10485760

# limit mailbox 1G

mailbox_size_limit = 1073741824
# for SMTP-Auth settings

smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
smtpd_sasl_local_domain = $myhostname
smtpd_client_restrictions = permit_mynetworks, reject_unknown_client, permit
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
root@mail:~#
vi /etc/postfix/body_checks
# reject if includes 'example.com' in mail body

/^(|[^>].*)example.com/ REJECT
root@mail:~#
root@mail:~#
service postfix restart

 * Stopping Postfix Mail Transport Agent postfix
   ...done.
 * Starting Postfix Mail Transport Agent postfix
   ...done.
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