The "mailto:" will always open the User's local email program as it is a client-side sorm. You must use a server-side form and SMTP. A database isn't necessary unless you are cording and/or working from a list of email addresses via a Member Mailing list.
Your current hosting package or service MUST allow SMTP ( http://en.wikipedia.org/wiki/Simple_Mail_Transfer_Protocol ) to work. Otherwise, no email can be sent.
PHP: Sending Email Tutorial (Text/HTML/Attachments): http://www.webcheatsheet.com/php/send_email_text_html_attachment.php
Use any of the below sites to make the workable form you need:
These are really good online form makers. Just follow the instructions for making it and uploading file(s).
Contact Form Generator: http://www.tele-pro.co.uk/scripts/contact_form/
WYSIWYG Form Maker: http://www.jotform.com/?gclid=CNKhqei1wJ4CFRQhnAod6laUqA
http://www.thesitewizard.com/wizards/feedbackform.shtml
Ajax - Creating an HTML Form: http://www.tizag.com/ajaxTutorial/ajaxform.php
http://www.phpform.org/
http://www.thepcmanwebsite.com/form_mail.shtml
http://emailmeform.com/
http://www.freecontactform.com/
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