Offer the ability to choose the "From" address the Contact form uses
Recently, the Contact form was changed to use the System Email as the From address when sending a pre-sales contact email to administrators.
A better resolution would be to allow users to specify whether they would like to use the System Email or the Client's email as the From address when sending a pre-sales contact email to administrators. This setting could potentially be included at Setup > General Settings > Mail.
This feature request was submitted on the behalf of a customer. If this is a feature that you would like to see possibly be included in a future version of the product please don't hesitate to comment and vote.