You must be doing a hell of a lot of volume to make that much from people emailing you.
Either that... or your contact form is over-promoted.
You'd be surprised how high conversion rates are when people think they can trust you and your site. No comment on my volume, but if you think an extra 8-10 leads/day is a lot, then perhaps you're not doing enough volume.
you try too hard
It's pretty automated, but thanks for your concern.