I have a P3 box with 120GB HDD that's doing web, ssh and samba at the moment. I am planning setup sendmail, spamd, mimedefang, clamd and spam-assassin on this box along with web, ssh and samba.
I was wondering if anyone has any experience with running a mail server at home. I want to know if I should use only one box or buy another box? Also, what sort of electricity bills will I run into? And also if is there anything else I would need to know. Thanks for any help.