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
SASL
- apt-get install libsasl2-2 sasl2-bin libsasl2-modules
- nano /etc/default/saslauthd # change START=yes
START=yes
PWDIR="/var/spool/postfix/var/run/saslauthd"
PARAMS="-m ${PWDIR}"
PIDFILE="${PWDIR}/saslauthd.pid"
DESC="SASL Authentication Daemon"
NAME="saslauthd"
MECHANISMS="shadow"
THREADS=5
OPTIONS="-c -m /var/spool/postfix/var/run/saslauthd"- dpkg-statoverride --force --update --add root sasl 755 /var/spool/postfix/var/run/saslauthd
echo 'pwcheck_method: saslauthd' > /etc/postfix/sasl/smtpd.conf
- usermod -a -G sasl postfix
- service saslauthd start
Test starttls
- openssl s_client -connect 127.0.0.1:25 -starttls smtp