I agree you probably need to contact your IT department to get things going. If they don't allow people to access the buisness email from outside the company (from home or laptops on the road) then your pretty much hosed. You might be able to setup a email forwarding system depending on their setup but (but there probably not going to want you doing that) otherwise they will either have to have the mail server exposed to the outside world or they will make you VPN into it.