= Postfix =
Postfix is a very popular open source Mail Transfer Agent (MTA).

== Steps for Ubuntu Ubuntu 14.04 LTS ==
 * apt-get update
 / apt-get install mailutils
 * apt-get install postfix
 * Choose ok, Internet Site
 * System mail name: bitarus.allowed.org
 * nano /etc/postfix/main.cf
{{{
mydomain=bitarus.allowed.org
myhostname = mail.bitarus.allowed.org
smtpd_recipient_restrictions=permit_sasl_authenticated , reject_unauth_destination
relay_domains=
smtpd_sasl_auth_enable=yes
smtpd_sasl_security_options=noanonymous
smtpd_sasl_local_domain=$myhostname
broken_sasl_auth_clients=yes
smtpd_relay_restrictions=permit_sasl_authenticated
home_mailbox=Mailbox
mail_spool_directory=/var/mail
}}}
 * service --status-all
 * service postfix restart

== User mail spool  ==
 * touch /var/mail/userx
 * chown vitor:mail /var/mail/userx
 * chmod o-r /var/mail/userx
 * chmod g+rw /var/mail/userx