I think this is what you want
have an html form say contact .htm..
<form name = "contact" action = "sent.php" method = "post" >
<table width = "100%" cellpadding = "2">
<tr><td width="150" >From:</td><td width="557">
<input type = "text" name = "from" size="46"></td></tr>
<tr><td width="150" >Subject:</td><td width="557">
<input type = "text" name = "subject" size="46"></td></tr>
<tr><td width="150" align=left valign=top>Comments:</td><td width="557"><textarea name= "comments" rows=10 cols=35></textarea></td></tr>
<tr><td width="150" ></td><td width="557">
<input type = "submit" name = "submit" value = "Send">
  <input type = "reset" name = "reset" value = "Clear"></table>
</form>
and send.php as
<?php
$email = "youemailid";
$from = $POST['from'];
$subject = $POST['subject'];
$message = $_POST['comments'];
mail($email,$subject,$message,"From:$from");
?>
thats it
Hope this helps
Greg