I stumbled today upon this while following a different article, maybe it is
helpful to you
http://www.kernel-panic.it/openbsd/mail/
> 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.
