You find a PHP script in the source folder, which will send an image to a custom mail address. In the PHP file you set also the sender mail address, recipient mail address, subject and mail text.   

//send data url to php script when clicking on a custom element
$('#save-image-php').click(function() {
	thsirtDesigner.getProductDataURL(function(dataURL) {
		
		$.post("php/send_image_via_mail.php", { base64_image: thsirtDesigner.getProductDataURL() }, function(data) {
	        if(data) {
	            console.log("Mail successfully sent!");
	        }
	        else {            
	 console.log("Mail could not be sent!");
	        }
	    });
		
	});
   
});