Hosting Email with a Dynamic IP & Exchange 2003

[TechCarnivore]

Hi Gang,
I've read a few sites about hosting email with a dynamic IP and I can't quite wrap my brain around the concept.

1) I have a Cable DSL connection with a dynamic IP
2) A Dyndns account
3) Access to my public DNS records for my domain name
4) A Linksys router/firewall
5) An Exchange 2003 server running sp2.

Can someone here help me understand the process involved with hosting my own emai? Specifically I don't understand how to configure the dyndns account to start routing mail to my dynamic IP and how my public DNS records (from the ISP) fit into the big picture.

 

[Zelandakh]

Use a smarthost on the SMTP gateway and route the email through your ISP