Simple mail server with webmail

Simple mail server by using postfix MTA, dovecot IMAP + SASL and SquirrelMail webmail. This guide is for getting basic mail server working in small amount of time. You can always add more features later.

postfix MTA

Remove ssmtp. (Blocks postfix)

root # emerge -C ssmtp

Install postfix. Enable use flags : dovecot-sasl ipv6 pam ssl

root # emerge --ask mail-mta/postfix

Configure postfix.

File/etc/postfix/main.cf

# basic config
myhostname = example.com
mydomain = example.com
myorigin = example.com
inet_interfaces = all
mynetworks_style = host
mydestination = $myhostname, localhost, $mydomain, mail.$mydomain, www.$mydomain
home_mailbox = .maildir/

# sasl config
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
smtpd_sasl_auth_enable = yes
smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination

Edit aliases. Redirect root mails to webmaster, add line "root: webmaster"

root # nano /etc/mail/aliases

Generate aliases database.

root # newaliases

Redirect root mails to webmaster. Add line : "webmaster@localhost"

root # nano /root/.forward

Check for errors.

root # postfix check

Start postfix.

root # /etc/init.d/postfix start

Check /var/log/mail.log for errors.

root # cat /var/log/mail.log

dovecot IMAP, POP & SASL

Install dovecot. Enable use flags : bzip2 ipv6 maildir pam ssl zlib

root # emerge --ask net-mail/dovecot

Configure dovecot.

File/etc/dovecot/dovecot.conf

protocols = imap pop3

# sasl config
service auth {
  unix_listener /var/spool/postfix/private/auth {
    mode = 0660
    user = postfix
    group = postfix
  }
}

Start dovecot.

root # /etc/init.d/dovecot start

SquirrelMail webmail

Change dir to webserver root.

user $ cd /home/webmaster/htdocs

Unpack squirrelmail.

user $ tar xjf squirrelmail-webmail-1.4.22.tar.bz2

Configure squirrelmail.

user $ cd squirrelmail-webmail-1.4.22/config

user $ cp config_default.php config.php

user $ nano config.php

Fileconfig.php

$data_dir = '/home/webmaster/.squirrelmail/data/';<br />
$attachment_dir = '/home/webmaster/.squirrelmail/attach/';<br />
$domain = 'example.com';<br />

Create data dirs and set permissions.

user $ mkdir -p /home/webmaster/.squirrelmail/data/

user $ mkdir -p /home/webmaster/.squirrelmail/attach/

root # chown -R webmaster:lighttpd /home/webmaster/.squirrelmail/

user $ chmod -R 770 /home/webmaster/.squirrelmail/

Debug squirrelmail by opening url : http://example.com/squirrelmail-webmail-1.4.22/src/configtest.php

You can access webmail by opening url : http://example.com/squirrelmail-webmail-1.4.22/. Everything should be working now :)