MJ, Whopity and CGB are in my experience correct, unless you happen to hit the right person on the right day (ie when they need a new FI) and they don't actually know anybody personally who's looking for a job, then unfortunately emailing CVs is a largely futile exercise.
We don't get as many as CGB, perhaps a couple a week, which I do always reply to, but we've never recruited from that source. Mostly, our instructors have been local, who've flown with, or been trained by us in the past, or recommended by someone whose opinion we trust. As CGB says, we'd be much more inclined to give someone a chance who actually turned up in person. I accept that this is more expensive and time-consuming than clicking send a few dozen times, but you need to put some effort in to get a result.