Were going to setup a e-mail server using postfix as our smtp server, dovecot as our pop3/imap server, ClamAV as out anit-virus and MailScanner as out e-mail anti-virus scanner on a fedora core 3 box & ilohamail as out webmail client.

Name: Dovecot
HomePage: http://dovecot.org/
Fuction: Dovecot is an open source IMAP and POP3 server for Linux/UNIX-like systems, written with security primarily in mind.

Name: Clamav
HomePage: http://www.clamav.net
Fuction: An open source anti-virus

Name: Postfix
HomePage: http://www.postfix.org/
Fuction:  Postfix attempts to be fast, easy to administer, and secure, while at the same time being sendmail compatible enough to not upset existing users

Name: MailScanner
HomePage: http://www.mailscanner.info/
Fuction: Scans all incomming and outgoing e-mails useing the system's anti-virus.

Name: Ilohamail
Homepage: http://blog.ilohamail.org/
fuction: Webmail client, used to check e-mails from anywhere in world, via the internet, like gmail or hotmail

Poptop is a VPN server, it creates network that is constructed by using public wires to connect nodes. Poptop use encryption and other security mechanisms to ensure that only authorized users can access the network and that the data cannot be intercepted.

Name: poptop
HomePage: http://www.poptop.org/
Function:  Poptop is the PPTP server solution for Linux, PPTP stands for Point to Point Tunneling Protocol