Although it may be pronounced either "VEE-ah" or "VIE-ah", which do you think is preferable?

My hunch is that if it occurs in a Latin phrase, such as via dolorosa or via media it should be given its Latin (?) pronunciation "VEE-ah" ; but if it occurs in an ordinary English context, like, "a file sent via e-mail" it should be given its English (?) pronunciation "VIE-ah."

Is this reasonable? Which do you use?