***** INSTALLING POSTFIX ON DEBIAN/UBUNTU ***** ********* Part 1 ************* $sudo apt-get install postfix mailutils telnet PRESS ENTER TO SELECT DEFAULT POSTFIX CONFIGS ********* Part 2 ************* Start Postfix: $sudo service postfix start Check the logs: $sudo tail -f /var/log/mail.log You should see something similar to: May 23 11:33:30 pc35 postfix/qmgr[18699]: F11042B8934: removed May 23 11:43:58 pc35 postfix/master[18688]: terminating on signal 15 May 23 11:44:19 pc35 postfix/master[19387]: daemon started -- version 2.11.3, configuration /etc/postfix ******** Part 3 ************* Check locally on port 25 $telnet localhost 25 You should see something similar to Trying ::1... Connected to localhost. Escape character is '^]'. 220 pc35.sse.ws.afnog.org ESMTP Postfix (Debian/GNU)