Bouncing email during vacations

Phil Windley has an interesting method of dealing with email while he's on vacation: he simply bounces them:

If you sent me email while I was on vacation, you got back a note telling you that your email wasn't saved and that you'd have to resend it when I got back. Sorry if any were offended, but I simply turned email off. When I got home, I turned it back on and I didn't have thousands of messages to slog through. More importantly, however, there weren't forty tasks waiting for me that people had given me while I was gone.