PHP - Refill Form Values Received From Drop Down Menu

I really need some help.  I am very new to PHP and I've been stuck for a couple of days.  I created a contact form and everything seems to be working correctly, except the mail is showing it's sent, but I never receive an email in my Inbox or Spam folder.  Can someone please review my code?

Here is the PHP:

<?php
  // DEFINE VARIABLE AND SET EMPTY VALUES
  $varfnameErr = $varlnameErr = $varemailErr = $varphoneErr = $varpositionErr = "";
  $varfname = $varlname = $varemail = $varphone = $varposition = $success = "";

  
  //FORM SUBMITTED WITH POST METHOD
  if ($_SERVER["REQUEST_METHOD"] == "POST") {

    //VALIDATE FIRST NAME
    if (empty($_POST["varfname"])) {
      $varfnameErr = "First Name is required";
    } else {
      $varfname = test_input($_POST["varfname"]);
      // MAKE SURE FIRST NAME ONLY CONTAINS LETTERS AND WHITE SPACE
      if (!preg_match("/^[a-zA-Z ]*$/",$varfname)) {
        $varfnameErr = "Only letters and white space are allowed";
      }
    }

    //VALIDATE LAST NAME
    if (empty($_POST["varlname"])) {
      $varlnameErr = "Last Name is required";
    } else {
      $varlname = test_input($_POST["varlname"]);
      // MAKE SURE LAST NAME ONLY CONTAINS LETTERS AND WHITE SPACE
      if (!preg_match("/^[a-zA-Z ]*$/",$varlname)) {
        $varlnameErr = "Only letters and white space are allowed";
      }
    }
  
    //VALIDATE EMAIL ADDRESS
    if (empty($_POST["varemail"])) {
      $varemailErr = "Email Address is required";
    } else {
      $varemail = test_input($_POST["varemail"]);
      // MAKE SURE EMAIL ADDRESS IS FORMATTED CORRECTLY
      if (!filter_var($varemail, FILTER_VALIDATE_EMAIL)) {
        $varemailErr = "Invalid email address format";
      }
    }

    //VALIDATE PHONE NUMBER
    if (empty($_POST["varphone"])) {
      $varphoneErr = "Phone number is required";
    } else {
      $varphone = test_input($_POST["varphone"]);
      // MAKE SURE PHONE NUMBER IS IN CORRECT FORMAT
      if (!preg_match("/^(\d[\s-]?)?[\(\[\s-]{0,2}?\d{3}[\)\]\s-]{0,2}?\d{3}[\s-]?\d{4}$/i",$varphone)) {
        $varphoneErr = "Invalid telephone format";
      }
    }
	
    //VALIDATE POSITION
    if (empty($_POST["varposition"])) {
      $varpositionErr = "Position is required";
    } else {
      $varposition = test_input($_POST["varposition"]);
    }

    //IF ALL DATA IS CORRECT
    if ($varfnameErr == '' and $varlnameErr == '' and $varemailErr == '' and $varphoneErr == '' and $varpositionErr == '') {
      $message_body = '';
      unset($_POST['submit']);

      //THIS IS JUST FOR TESTING PURPOSES
      $message_body = $varfname;

      //foreach ($_POST as $key => $value) {
      //    $message_body .= "$key: $value\n";
      //}
      $to = 'mygmail@gmail.com';
      $subject = 'Volunteer Form Submission';
      
      $message = wordwrap($message_body, 70);
      $headers  = 'MIME-Version: 1.0' . "\r\n"; 
      $headers .= 'Content-type: text/html; charset=utf-8' . "\r\n";
      $headers .= "From: " . $varemail . "\r\n";
      $subject = 'Volunteer Form Submission';
      $to = 'mygmail@gmail.com';
      $result = mail($to, $subject, $message, $headers);
      //THIS RETURNS "1"
      print $result;
      
      //IF ALL DATA IS CORRECT MAKE SURE EMAIL WAS SENT
      if (mail($to, $subject, $message, $headers)) {
        $success = "Message sent. Thank you contacting us! We will reply as soon as possible.";
        $varfname = $varlname = $varemail = $varphone = $varposition = "";
      } else {
        $success = "Something went wrong!";
      }
    }
  }

//STRIP UNWANTED CHARACTERS FROM VARIABLES
function test_input($data) {
  $data = trim($data);
  $data = stripslashes($data);
  $data = htmlspecialchars($data);
  return $data;
}
?>

Here is the HTML:

    <div class="row regformrow">
      <div class="coffee-span-12 regformcolumn">
        <div class="subgrid regformsubgrid">
          <div class="row regformsubgridheaderrow">
            <div class="coffee-span-12 regformsubgridheadercolumn">
              <h4 class="regformsubgridheadertitle">Volunteer Form</h4>
            </div>
          </div>
          <div class="row regformsubgridrow">
            <form class="form-container regformsubgridformcontainer" action=<?= $_SERVER['PHP_SELF']; ?> method="post">
              <div class="coffee-span-4 coffee-972-span-6 coffee-458-span-12 regformsubgridcolumn1">
                <div class="container regformsubgridcontainer1">
                  <label class="label form-label-all"><span style="font-style:italic;color:#FF5454;">* Required Fields</span></label></br>
                  <div class="formfieldgroup">
                    <input class="fname" name="varfname" type="text" tabindex="1" placeholder="First Name" value="<?= $varfname; ?>"><span class="requiredfield"> *</span>
                    <span class="form-error"><?= $varfnameErr ?></span>
                  </div>
                  <div class="formfieldgroup">
                    <input class="lname" name="varlname" type="text" tabindex="2" placeholder="Last Name" value="<?= $varlname; ?>"><span class="requiredfield"> *</span>
                    <span class="form-error"><?= $varlnameErr ?></span>
                  </div>
                  <div class="formfieldgroup">
                    <input class="email" name="varemail" type="text" tabindex="2" placeholder="Email Address" value="<?= $varemail; ?>"><span class="requiredfield"> *</span>
                    <span class="form-error"><?= $varemailErr ?></span>
                  </div>
                  <div class="formfieldgroup">
                    <input class="phone" name="varphone" type="text" tabindex="2" placeholder="Telephone Number" value="<?= $varphone; ?>"><span class="requiredfield"> *</span>
                    <span class="form-error"><?= $varphoneErr ?></span>
                  </div>
                  <div class="formfieldgroup">
                    <select class="select selectbox" name="varposition" id="varposition" tabindex="5"><option value="">Select one...</option><option value="Chaperone">Chaperone</option><option value="Class Monitor">Class Monitor</option><option value="Parking Attendant">Parking Attendant</option><option value="Party Coordinator">Party Coordinator</option><option value="Teacher Aid">Teacher Aid</option></select><span class="requiredfield"> *</span>
                    <span class="form-error"><?= $varpositionErr ?></span>
                  </div>
                  <div class="formfieldgroup">
                    <input class="test" name="test" type="text" tabindex="6" placeholder="If you are human, leave this field blank" value="">
                  </div>
                  <div class="formfieldgroup">
                    <button type="submit" class="button-submit-1" name="submit" tabindex="7" data-submit="...Sendng">Submit</button>
                  </div>
                  <div class="formfieldgroup">
  				  <div class="success"><?= $success; ?></div>
                  </div>
                </div>
              </div>
            </form>
          </div>
        </div>
      </div>
    </div>

<?php
/* Program name: exercise_4_form.inc
* Description: Defines a form that collects a user's
* name and mailing address.
*/
$rows = array( "first_name" => "First Name (optional)",
"last_name" => "Last Name",
"phone" => "Phone Number",
"city" => "City",
"state" => "State",
"address" => "Address",
"zip_code" => "ZIP Code",
"e_mail" => "E-Mail");

$states_list = array('AL'=>"Alabama",'AK'=>"Alaska",'AZ'=>"Arizona",
'AR'=>"Arkansas",'CA'=>"California",'CO'=>"Colorado",'CT'=>"Connecticut",
'DE'=>"Delaware",'DC'=>"District Of Columbia",'FL'=>"Florida",'GA'=>"Georgia",
'HI'=>"Hawaii",'ID'=>"Idaho",'IL'=>"Illinois", 'IN'=>"Indiana", 'IA'=>"Iowa",
'KS'=>"Kansas",'KY'=>"Kentucky",'LA'=>"Louisiana",'ME'=>"Maine",
'MD'=>"Maryland", 'MA'=>"Massachusetts",'MI'=>"Michigan",'MN'=>"Minnesota",
'MS'=>"Mississippi",'MO'=>"Missouri",'MT'=>"Montana",'NE'=>"Nebraska",
'NV'=>"Nevada",'NH'=>"New Hampshire",'NJ'=>"New Jersey",'NM'=>"New Mexico",
'NY'=>"New York",'NC'=>"North Carolina",'ND'=>"North Dakota",'OH'=>"Ohio",
'OK'=>"Oklahoma", 'OR'=>"Oregon",'PA'=>"Pennsylvania",'RI'=>"Rhode Island",
'SC'=>"South Carolina",'SD'=>"South Dakota",'TN'=>"Tennessee",'TX'=>"Texas",
'UT'=>"Utah",'VT'=>"Vermont",'VA'=>"Virginia",'WA'=>"Washington",'WV'=>"West Virginia",
'WI'=>"Wisconsin",'WY'=>"Wyoming");


$submit = "Submit mailing information";
?>
<html>
<head>
<style type='text/css'>
<!--
body {
background: #42413C;
color: #000;
font-family: Tahoma, Geneva, sans-serif;
font-size: 90%;
}
form {
margin: 1em 2 2 2;
padding: 1;
width: 1100px;
margin-left: 35%;

}
.field {padding-bottom: 1em;

}
label {
font-weight: bold;
float: left;
width: 15%;
margin-right: 1em;
text-align: right;
background-color: #9F6;
padding-right: 5px;

}
select {margin-bottom: 1em;}

#submit {
margin-left: 15%;
}
h3 {
width: 500px;
margin-left: 35%;
}


-->
</style>
</head>
<body>
<h3>Please enter your mailing information below:</h3>
<?php
/* loop that displays the form */
echo "<form action='$_SERVER[PHP_SELF]' method='POST'>";
foreach($rows as $field => $label)

if($field == "state")
{
echo "<label for='$field'>$label</label>
<select id='$field' name='$field'>\n";

foreach ( $states_list as $abbr => $sname )
{
echo "<option value='$abbr'>$sname</option>\n";
}
echo "</select>\n";
}
else
{
echo "<div class='field'><label for='$field'>$label</label>
<input id='$field' name='$field' type='text' value='".@$$field."'
size='25%' maxlength='65' /></div>\n";
}

echo "<div id='submit'>
<input type='hidden' name='submitted' value='yes'>
<input type='submit' value='$submit'></div>";
?>

</form>
</body>
</html>

<?php
/* Program name: exercise_4_form_verifications.php
* Description: Program checks all the form fields for
* blank fields and verifies them
*/

if(isset($_POST['submitted']) and $_POST['submitted'] == "yes")
{
foreach($_POST as $field => $value)
{
if(empty($value))
{
if($field != "first_name")
{
$blank_array[] = $field;
}
}
else
{
$good_data[$field] = strip_tags(trim($value));
}
}



if(@sizeof($blank_array) > 0)
{
$message = "<p style='color: black; margin-bottom: 0;font-weight: bold; margin-left: 35%'>
You didn't fill in one or more required fields.
You must enter:
<ul style='color: yellow; margin-top: 0; margin-left: 35%;
list-style: none' >";

foreach($blank_array as $value)
{
$message .= "<li>$value</li>";
}
$message .= "</ul>";
echo $message;
extract($good_data);
include("exercise_4_form.inc");
exit();
}
foreach($_POST as $field => $value)
{
if(!empty($value))
{
$name_verify = "/^[A-Za-z' -]{1,50}$/";
$phone_verify = "/^[0-9)(xX -]{7,20}$/";
$city_verify = "/^[A-Za-z' -]{1,50}$/";
$address_verify = "/^[A-Za-z0-9 .,'-]{1,50}$/";
$zip_verify = "/^[0-9]{5}(\-[0-9]{4})?$/";
$e_mail_verify = "/^.+@.+\\..+$/";

if(preg_match("/last/i",$field))
{
if(!preg_match($name_verify,$value))
{
$error_array[] = "$value is not a valid last name";
}
}
if(preg_match("/phone/i",$field))
{
if(!preg_match($phone_verify,$value))
{
$error_array[] = "$value is not a valid phone number";
}
} // endif phone format check
if(preg_match("/city/i",$field))
{
if(!preg_match($city_verify,$value))
{
$error_array[] = "$value is not a valid city";
}

}
if(preg_match("/address/i",$field))
{
if(!preg_match($address_verify,$value))
{
$error_array[] = "$value is not a valid address";
}
}
if(preg_match("/zip/i",$field))
{
if(!preg_match($zip_verify,$value))
{
$error_array[] = "$value is not a valid ZIP code";
}
}
if(preg_match("/e_mail/i",$field))
{
if(!preg_match($e_mail_verify,$value))
{
$error_array[] = "$value is not a valid e-mail address";
}
}
}
$clean_data[$field] = strip_tags(trim($value));
}
if(@sizeof($error_array) > 0)
{

$message = "<ul style='color: yellow; margin-top: 0; margin-left: 35%;
list-style: none' >";
foreach($error_array as $value)
{
$message .= "<li>$value</li>";
}
$message .= "</ul>";


echo $message;
extract($clean_data);
include("exercise_4_form.inc");
exit();
}
else
{
echo "<ol>";
foreach($_POST as $field => $value)
{ echo "<h3><li> $field = $value</li></h3>";
}
echo "</ol>";
}
}
else
{
include("exercise_4_form.inc");
}
?>