It's amazing how often doing this completely bypasses any corporate first-line-support structure in the way, and just puts the email right into the inbox of the line engineers working directly on the product. It's also amazing how quickly those line engineers reply. (It's as if they treat "replying to random messages on the product mailing list" as their highest-priority job. Or maybe it's just that they're technical people, and my questions are usually very nerd-snipe-y, and get them hooked.)