Experts need some advise ands ideas on how to handle the following. We are using hosted pop mail email@example.com in our outlook clients. THe new/first exchange 2003 will have mail addresses using the sam @popdomain.com. I can not think of a way to transition some of the 35 users over using their existing address by using/setting up the MX record wthout causing the pop mail addresses to stop working. I'm not sure this will be doable, but basically the goal is to use the same domain name ie MX record but not have the hosted pop emaill addresses stop working?
Can you please expand on the process to the accomplish the "arrange for sending any email from the hosting company"? What do you mean?