Mail issues with PHP, Unable to send

I am currently using a feed back form on my site and I am trying to get that feedback form to send to my email but keep getting notices maybe someone can send me the right way to write it thanks so much here is all my code and the errors..

FORM

    <script type="text/javascript">
    function MM_validateForm() { //v4.0
      if (document.getElementById){
        var i,p,q,nm,test,num,min,max,errors='',args=MM_validateForm.arguments;
        for (i=0; i<(args.length-2); i+=3) { test=args[i+2]; val=document.getElementById(args[i]);
          if (val) { nm=val.name; if ((val=val.value)!="") {
            if (test.indexOf('isEmail')!=-1) { p=val.indexOf('@');
              if (p<1 || p==(val.length-1)) errors+='- '+nm+' must contain an e-mail address.\n';
            } else if (test!='R') { num = parseFloat(val);
              if (isNaN(val)) errors+='- '+nm+' must contain a number.\n';
              if (test.indexOf('inRange') != -1) { p=test.indexOf(':');
                min=test.substring(8,p); max=test.substring(p+1);
                if (num<min || max<num) errors+='- '+nm+' must contain a number between '+min+' and '+max+'.\n';
          } } } else if (test.charAt(0) == 'R') errors += '- '+nm+' is required.\n'; }
        } if (errors) alert('The following error(s) occurred:\n'+errors);
        document.MM_returnValue = (errors == '');
    } }
    </script>
            <div id="services">
              <h3><a href="services.php">Services</a></h3>
              <p>What we can do</p>
              <ul>
               <li>item</li>
               <li>item</li>
               <li>item</li>
               <li>item</li>
              </ul>
              </div>
            <div id="portfolio">
              <h3><a href="portfolio.php">Portfolio</a></h3>
                 <p>Some of our work</p>
            </div>
            <div id="hireus">
          <h3><a href="services.php">Request more info below!</a></h3>
          <form action="processor.php" method="post" name="myform" id="myform" onsubmit="MM_validateForm('fname','','R','lname','','R','email','','RisEmail','phone','','NisNum');return document.MM_returnValue">
        <label for="fname">First name</label>
        <input name="fname" type="text" id="fname" />
        <label for="lname">Last name</label>
        <input name="lname" type="text" id="lname" />
        <label for="email">Email Address</label>
        <input name="email" type="text" id="email" />
        <label for="phone">Phone Number</label>
        <input name="phone" type="text" id="phone" placeholder="800.867.5309" />
        <fieldset class="checkgroup">
        <legend>Services Interested In:</legend>
        <input name="services" type="checkbox" value="services_web" id="services_web" />
        <label for="services_web">Web Design</label>
         <input name="services" type="checkbox" value="services_design" id="services_design" />
        <label for="services_web">Video & 3D</label>
         <input name="services" type="checkbox" value="services_consultation" id="services_consultation" />
        <label for="services_web">Consulation</label>
        </fieldset>
        <textarea name="comments" id="comments" cols="35" rows="3"></textarea>
        <input name="submit" type="submit" value="Submit Info" />
        </form>

              </div>

 PROCESSOR 



<?php
/************************

*PHP Form Processor * *************/

//Trim removes white space after strip_tags gets rid of any html, javascript, etc tags from the input
$fname = trim(strip_tags($_POST['fname']));
$lname = trim(strip_tags($_POST['lname']));
$email = trim(strip_tags($_POST['email']));
$phone = trim(strip_tags($_POST['phone']));
$services = trim(strip_tags($_POST['services']));
$comments = trim(strip_tags($_POST['comments']));

//Creating a single variable to format and hold all the inputs
$body = "
Website Contact Form
First Name: $fname
Last Name: $lname
Email Address: $email
Phone: $phone
Services Interested In: $services
Comments: $comments";

mail ("[email protected]","Widget Box Contact Form","$body","$email");
mail ("$email","Widget Box Contact Form","$body","[email protected]");

?>
<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<link rel="stylesheet" type="text/css" href="css/reset.css" />
<link rel="stylesheet" type="text/css" href="css/formatBlog.css" />
<title>Schell Shock Design's Portfolio</title>
</head>

<body class="tos">
  <div id="login">
   <?php include('login.php'); ?>
</div>
  </div>
  <div id="utilities">
   <?php include('utilities.php'); ?>
  </div>
<div id="container">
  <header>
    <?php include('header.php'); ?>
   </header>
 <div id="formsuccess">
            <h3>Thank You!</h3>
    <?php
//if the email was sent, show the success message
    echo '<div class="success">Thanks '.$fname.'. Your message was sent.</div>';
        echo '<div class="success">A copy of your form results were also mailed to '.$email.'.</div>';
    echo '<div class="success">We will get back to you at: '.$email.' or at: '.$phone.' within 24 hours.</div>';
?>

          </div>
  <div id="footer">
    <?php include('footer.php'); ?>
         </div>
</div>
</body>
</html>

My Warnings:

Warning: mail() [function.mail]: "sendmail_from" not set in php.ini or custom "From:" header missing in C:\xampp\htdocs\schellshockdesign.com\term5final\finalproject\processor.php on line 24

Warning: mail() [function.mail]: "sendmail_from" not set in php.ini or custom "From:" header missing in C:\xampp\htdocs\schellshockdesign.com\term5final\finalproject\processor.php on line 25