Thanks for the welcomes

Ok, not to sound ignorant, and I appreciate your help John, but I am not sure what a BES is. I have been fortunate enough that the IT guys at both of my jobs have done this kind of stuff for me and just handed me a configured device each time. Now, I want to figure out a way to do it on my own.
If I can only have one BES account but 10 additional email accounts set up, what are the restrictions for those accounts? Will replies appear as if they came straight from my desktop?
thanks again!