disabling email sending

[jsharper]

I'd like to disable the ability for my dev/test board instance to send out any email to avoid the possibility of an end user ever getting an email from the dev board (which causes nothing but confusion). I know I can delete the scheduled tasks that send most of it, but then I have to do that every time I copy the database from production to dev (which I've been doing a lot lately to keep dev current) and it still doesn't prevent emails from going out if someone posts to a thread that someone is subscribed to.

Is there somewhere quick and easy I can comment something out or otherwise modify some code to disable all email sending abilities? Note that I use the same instance of apache/php for the prod board, so I can't just deliberately break or misconfigure php's mail sending abilities or it will also break the prod board.

This is with vB 3.0.7

Thanks