does anyone know of a good program that will switch the outgoing mail server settings with just a mouse click or something like that?

with all the port 25 blocking going on now my work people have to change the setting when in the office and then change it when they work from home and that seems to be just a tad bit over the limit of their technical ability, even though it seems simple enough.

i am thinking there has to be a free program out there like that...or a script or something.....