So you are sugessting better prematurely "optimizing" every call to be remote from the beginnig? Wouldnt anyone wrap remote services behind a facade anyways instead of directly calling a http client? I fail to see how this leads to an interface that expresses the remoteness more in most of the cases.
I'm suggesting that you can't always abstract away things the way you'd like. The idea of how to send an email is highly abstractable, the idea of some other entity doing it leaks and rightly should.
