Do not understand form action right

Do not understand form action right

This is the first time I've try to use a formulae to make a contact page
on my site.
This is the code I use (and tried to adapt for my purposes):
<div id="main" class="content container bottom clearfix">
<div class="cont row">
<!-- FORM-->
<div class="form sevencol" style="width:52%">
<form action="mailto:contact@stefanseifert.com" id="contactForm"
method="post">
<ul class="contactform">
<li><input type="text" name="contactName" id="contactName" value=""
class="required requiredField"/>
<label for="contactName">Name</label>
</li>
<li>
<input type="text" name="email" id="email" value="" class="required
requiredField email"/>
<label for="email">E-Mail</label>
</li>
<li class="textarea">
<textarea name="comments" id="commentsText" rows="10" cols="10"
class=" required requiredField"></textarea>
</li>
<li>
<script type="text/javascript"
src="http://www.google.com/recaptcha/api/challenge?k=6Lf-ueMSAAAAAExUbwjvdqnNuNjlkeN3_wQyl720"></script>
<noscript>
<iframe
src="http://www.google.com/recaptcha/api/noscript?k=6Lf-ueMSAAAAAExUbwjvdqnNuNjlkeN3_wQyl720"
height="300" width="500" frameborder="0"></iframe><br/>
<textarea name="recaptcha_challenge_field" rows="3" cols="40"></textarea>
<input type="hidden" name="recaptcha_response_field"
value="manual_challenge"/>
</noscript>
</li>
<li class="buttons"><br>
<input type="hidden" name="submitted" id="submitted" value="true"/>
<button type="submit" class="submit superlink">E-Mail senden</button>
</li>
</ul>
</form>
</div>
<!-- END FORM-->
</div>
The result of it, is that every time I test it my Email program opens and
fills part of the code inside a new mail of mine. What is wrong here?
What I wanted was that a mail with the content of the input fields is sent
to me, instead! Appreciate your help! Thanks very much
Garavani