While you cannot directly send emails from other people's servers, you can achieve the same effect for most users by either using a mailto href to create a hyperlink that launches email, or by having a form which is submitted to a mailto.

This approach should launch the configured local email client on the user's machine and then send email from there. But not all clients will be properly configured for this. (Any time you move work client side you have the problem that not every client is set up right. Such is life...)