Не приходит письмо на почту

[omega24v]

Ранее пользовался данным отправщиком, сейчас чет подвёл. В ответ 200-тая, но письма нет..
http://omega24v.esy.es/

<form>
                    <h4>Заказать звонок</h4>
 
                    <!-- Hidden Required Fields -->
                    <input type="hidden" name="project_name" value="www">
                    <input type="hidden" name="admin_email" value="omega24v@mail.ru">
                    <input type="hidden" name="form_subject" value="Заказ товара">
                    <!-- END Hidden Required Fields -->
 
                    <input type="text" name="Имя" placeholder="Ваше имя..." required>
                    <input type="text" name="Телефон" placeholder="Ваш номер телефона..." >
                    <input type="email" name="E-mail" placeholder="Ваш email..." >
                    
                    <button class="call-bt">Оставить заявку</button>
                </form>

$(document).ready(function() {
 
    //E-mail Ajax Send
    $("form").submit(function() { //Change
        var th = $(this);
        $.ajax({
            type: "POST",
            url: "mail.php", //Change
            data: th.serialize()
        }).done(function() {
            alert("Thank you!");
            setTimeout(function() {
                // Done Functions
                th.trigger("reset");
            }, 1000);
        });
        return false;
    });
 
});

<?php
 
$method = $_SERVER['REQUEST_METHOD'];
 
//Script Foreach
$c = true;
if ( $method === 'POST' ) {
 
    $project_name = trim($_POST["project_name"]);
    $admin_email  = trim($_POST["admin_email"]);
    $form_subject = trim($_POST["form_subject"]);
 
    foreach ( $_POST as $key => $value ) {
        if ( $value != "" && $key != "project_name" && $key != "admin_email" && $key != "form_subject" ) {
            $message .= "
            " . ( ($c = !$c) ? '<tr>':'<tr style="background-color: #f8f8f8;">' ) . "
            <td style='padding: 10px; border: #e9e9e9 1px solid;'><b>$key</b></td>
            <td style='padding: 10px; border: #e9e9e9 1px solid;'>$value</td>
        </tr>
        ";
    }
}
} else if ( $method === 'GET' ) {
 
    $project_name = trim($_GET["project_name"]);
    $admin_email  = trim($_GET["admin_email"]);
    $form_subject = trim($_GET["form_subject"]);
 
    foreach ( $_GET as $key => $value ) {
        if ( $value != "" && $key != "project_name" && $key != "admin_email" && $key != "form_subject" ) {
            $message .= "
            " . ( ($c = !$c) ? '<tr>':'<tr style="background-color: #f8f8f8;">' ) . "
            <td style='padding: 10px; border: #e9e9e9 1px solid;'><b>$key</b></td>
            <td style='padding: 10px; border: #e9e9e9 1px solid;'>$value</td>
        </tr>
        ";
    }
}
}
 
$message = "<table style='width: 100%;'>$message</table>";
 
function adopt($text) {
    return '=?UTF-8?B?'.base64_encode($text).'?=';
}
 
$headers = "MIME-Version: 1.0" . PHP_EOL .
"Content-Type: text/html; charset=utf-8" . PHP_EOL .
'From: '.adopt($project_name).' <'.$admin_email.'>' . PHP_EOL .
'Reply-To: '.$admin_email.'' . PHP_EOL;
 
mail($admin_email, adopt($form_subject), $message, $headers );