[otrs] Server Confuguration Help

Hi, I am able to install otrs on debian sarge, but I am having some trouble figuring out the email part of things. I'm not sure how to get the system to send/receive emails (I don't have a local mail server so I'd like to use my isp or another email account) My Isp will filter any sort of sendmail activity because they think that the machine is a zombie. I'll be hosting this out of my home for now with a dynamic WAN IP perhaps using dyndns or something to make it available to clients later but that's a seperate issue for now. Can anyone provide any assistance or suggestions ? -- David Frohwerk