Others may disagree, but a handwritten letter is always appreciated and like blueangel said, it shows that you're serious about it, especially if your letter comments upon something different from the email. If you address it to someone specific, that would be even better. Yes, snail mail can get lost too but if you've done both, one will get where it needs to go and hopefully you'll get an answer sooner rather than later.... but don't get discouraged if it's July or August. Things may happen behind the scenes that you aren't aware of
