i am not recveing email form my Website i am reving

Hello after 4th of December i am not reeving mail email form my website , from my inquiry from ,
before 4th December we reeving all the mail , but after 4th we didn't receiving any email from my php inquiry from

my email id is : info@indianpackersmovers.in

below my script

<?php
/* Set e-mail recipient */
$myemail = " info@indianpackersmovers.in";

/* Check all form inputs using check_input function */
$yourname = check_input($_POST['name'], "Enter your name");
$email    = check_input($_POST['email'], "Write a subject");
$number    = check_input($_POST['contact']);
$from   = check_input($_POST['from']);
$to = check_input($_POST['to']);

/* If e-mail is not valid show error message */
if (!preg_match("/([\w\-]+\@[\w\-]+\.[\w\-]+)/", $email))
{
    show_error("E-mail address not valid");
}

/* Let's prepare the message for the e-mail */
$message = "indian Packers and Movers!

Your contact form has been submitted by:

Name: $yourname
E-mail: $email
Number: $number
Moving-From : $from
Moving-To : $to

End of message
";

/* Send the message using mail() function */
mail($myemail, $number, $message);

/* Redirect visitor to the thank you page */
header('Location: thank-you.html');
exit();

/* Functions we used */
function check_input($data, $problem='')
{
    $data = trim($data);
    $data = stripslashes($data);
    $data = htmlspecialchars($data);
    if ($problem && strlen($data) == 0)
    {
        show_error($problem);
    }
    return $data;
}

function show_error($myError)
{
?>
    <html>
    <body>

    <b>Please correct the following error:</b><br />
    <?php echo $myError; ?>

    </body>
    </html>
<?php
exit();
}
?>