mail function not working correctly

[amarniit]

hello,

i a creating a enquery form on my website but i am ot able to use php mail function. i try this code but mail not sent to my id. please suggest me how can i correct this code.

<?php
                                    }else{
                                        if (isset($_POST["from"])) {
                                            $email_a = $_POST["email"];
                                            $headers =  "From: ".$email_a. "\r\n" . 
                                            $subject = $_POST["subject"];
                                            $message = $_POST["message"];
                                            // message lines should not exceed 70 characters (PHP rule), so wrap it
                                            $message = wordwrap($message, 70);
                                            // send mail
                                            mail("[e-mail]",$subject,$message,$headers);
                        echo '<tr><td></td><td align="left" valign="top" ><div style="padding:20px;">Thank you for sending us feedback</div></td></tr>';
 
                                            }
                                            }
                                        ?>

my website is
http://kanjitour.com/contact.php

[Dormilich]

have you checked your spam folder? mails like that where the FROM email address (gmail.com) does not match the sending server (kanjitour.com) are likely to end up there