PHP form not submitting to email

Hi everyone,

I've created a website with a simple form that when filled in sends the information in a form of an email to the specified email address.

For some reason I don't seem to be receiving emails anymore at all whereas i used to be able to get them, i've tested it myself by entering dummy info and submiting, yet I still don't get anything. All problem I can think of is that I accidentally changed the code in the past month or two, but I can't seem to find what's wrong. Please someone help, the code for the form and the php is here:

form:

                    <form  id="theForm" name="theForm" method="post" onsubmit="return formValidating();" action="sendTo.php">
                        <p> Full name: </p>
                        <input type="text" name="theName" id="theName" placeholder="Your name"/>
                        <p> Email address: </p>
                        <input type="email" name="emailAddress" id="emailAddress" placeholder="Eg, me@thePlace.net" />
                        <p> Contact number: </p>
                        <input type="text" name="theNumber" id="theNumber" placeholder="tel"/>
                        <p> Area: </p>
                        <input type="text" name="theArea" id="theArea" placeholder="Your area"/>                
                        <p> Description (photoshoot details):        </p>              
                        <textarea name="theDescription" id="theDescription" placeholder="tel" rows="10" cols="30"> </textarea> <br/>     <br/>  
                        <input type="submit" value="Send" id="submitButton" />
                    </form>
 

 PHP "sendTo.php"

<?php
		  $name = $_POST['theName'];
		  $visitor_email = $_POST['emailAddress'];
		  $number = $_POST['theNumber'];
		  $area = $_POST['theArea'];
		  $description = $_POST['theDescription'];

			$email_from = 'info@luketannous.com';
			$email_subject = "LT Photography New Form submission";
			$email_body = "You have received a new message from the user: ".$name."\n \n
									His email address: ".$visitor_email ."\n  
									His contact details: ". $number ."\n
									His area: ". $area ."\n
									Photoshoot Description : ". $description ." \n".
									
			$to = "donnierisk@gmail.com";							
			$headers = "From: $email_from \r\n";
			$headers .= "Reply-To: $visitor_email \r\n";
			
			$success = mail($to,$email_subject,$email_body,$headers);	
			
			if($success){
				echo "<div style='height:200px'> </div><p style='text-align:center;margin:auto;'>Your e-mail has been sent succesfully.</p> ";
				echo "<p style='text-align:center;margin:auto;'> <br/>Automatically redirecting you back to the home page...</p> ";
				header( "refresh:5;url=index.html" );
			}
			else{
				echo "<div style='height:200px'> </div><p style='text-align:center;margin:auto;'>Your email failed to send, please try again or contact me via telephone</p> ";
				echo "<p style='text-align:center;margin:auto;'>Click <a href='contact.html'> here </a> to go back to the contact page</p> ";
			}
		?>

Note that I have omitted irrelevant code (html tags, etc).

The submit button works, because the page comes up with the if($success) part, you can check here to see for yourself: http://www.luketannous.co.za/contact.html

Hope someone can help me with this simple and embarrassing problem.