The trouble with using this long-obsolete method (mailto) to send form results is its unpredictability. The method it is highly dependent on the browser in use
In addition, if you place an unobfuscated email address in your webpage, the bots will quickly find it and inundate you in spam.
Modern browsers no longer accept mailto: as a form action - they simply open the email program (if any) and ignore the form. If you are going to use a form then use a server-side CGI formmail script as the action - there are several good free ones out there.
For a simple PHP form feedback script see:- http://www.thesitewizard.com/archive/feedbackphp.shtml
“Always acknowledge a fault. This will throw those in authority off their guard and give you an opportunity to commit more.” - Mark Twain