مشکل در ارسال ایمیل

[پیام حیاتی]

سلام
قسمتی برای بازگرداندن پسورد کاربر از طریق ایمیل در سایت ایجاد کردم اما ایمیل ارسال نمی شود.
این کدها:

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//receive user if (isset($_POST['sub_receive_pass']) && !empty($_POST['txtEmail'])) {    $email = htmlentities($_POST['txtEmail']);    $safe_email = mysqli_real_escape_string($conn, $email);    //search pass    $sel_user = "select * from users where u_email = '$safe_email'";    $run_user = mysqli_query($conn, $sel_user);    $check_user = mysqli_num_rows($run_user);    $main_email = "";    if ($check_user > 0) {        mysqli_set_charset($conn, "utf8");        $sql = "SELECT * FROM users where u_email = '$safe_email'";        $result = mysqli_query($conn, $sql);        while ($row = mysqli_fetch_assoc($result)) {            $main_email = $row["u_email"];            $pass = $row["u_pass"];            //send email            $headers = "MIME-Version: 1.0" . "rn";            $headers .= "Content-type:text/html;charset=UTF-8" . "rn";            // More headers            $headers .= 'From: <webmaster@example.com>' . "rn";            $headers .= 'Cc: myboss@example.com' . "rn";            $subject = "Password key";            $descrip = "";            //mail("payam.hayati@yahoo","$subject","$descrip","From : $email","$headers");            mail("$main_email", "$subject", "$descrip", "Password : $pass", "$headers");            echo "<script>alert('Password sent to your email')</script>";            echo "<script>window.open('forget.php', '_self')</script>";            return;        }    } else {        echo "<script>alert('This email is not registered in the system!')</script>";        echo "<script>window.open('forget.php', '_self')</script>";    } } if (isset($_POST['sub_receive_pass']) && empty($_POST['txtEmail'])) {    echo "<script>alert('Enter your email address')</script>";    echo "<script>window.open('forget.php', '_self')</script>"; }

تشکر

[ADMIN]

از PHP Mailer یا SwiftMailer استفاده کنید. تنظیمات SMTP سایتتون رو داخلش وارد کنید تا ایمیل به‌درستی ارسال بشه.