How to SMTP (Email) Server Fedora 6?

[Terry Snyder]

Please be kind to me, I would like to know how to setup linux to be an
email server to receive emails like microsoft exchange does.  I would
also like to forward emails from an Exchange 2003 server to this linux
box for it to handle incoming helpdesk requests.  I have searched
google all last week and can't seem to get emails to get into the user
accounts on the linux box, can someone enlighten me please?

Trying to use sendmail on the linux box.  Helpdesk software is called PerlDesk.

Thanks for any help I can get at this point.

-- 
Terry Snyder Jr
Computer Support Specialist
http://www.personal.psu.edu/tes215
Linux (Red Hat, Fedora Core), Windows, Mac
Current OS Fedora Core 6.