Postfix
For relaying
To Enable relay for domains
Form shell
echo "relay_domains = /etc/postfix/relay" >> /etc/postfix/main.cf echo "[DOMAIN NAME HERE]" >> /etc/postfix/relay echo "[DOMAIN NAME HERE] smtp:[IP ADDRESS TO FORWARD TO] >> /etc/postfix/transport postmap /etc/postfix/transport postfix reload
to add additional domains:
echo "[DOMAIN NAME HERE]" >> /etc/postfix/relay echo "[DOMAIN NAME HERE] smtp:[IP ADDRESS TO FORWARD TO] >> /etc/postfix/transport postmap /etc/postfix/transport postfix reload
http://www.howtoforge.com/amavisd_postfix_debian_ubuntu
http://www.freespamfilter.org/FC4.html#_Toc110999175
http://flurdy.com/docs/postfix/
http://www.howtoforge.com/virtual_users_postfix_courier_mailscanner_clamav_centos