Procedure can be found at this website. I followed this procedure.
http://www.pixelinx.com/2010/10/creating-a-mail-server-on-ubuntu-using-postfix-courier-ssltls-spamassassin-clamav-and-amavis/
Procedure can be found at this website. I followed this procedure.
http:// www.pixelinx. com/2010/ 10/creating- a-mail- server- on-ubuntu- using-postfix- courier- ssltls- spamassassin- clamav- and-amavis/