我的PHP Contactform发送不正确

Question

我的网站上有一个联系表，我希望它发送到我的contactform.php中，我必须将其发送到我的电子邮件中。我不知道为什么它不起作用。我填写了详细信息，然后单击“提交”，但没有任何反应。更具体地说，它将进入空白屏幕，并且没有任何内容发送到我的电子邮件中。

          <h3 id="required">Contact Me</h3>
          <form id="contactform" method="POST" action="scripts/contactform.php">
            <label for="cname">Name</label>
            <input type="text" id="cname" name="name" required>
            <label for="cemail">Email</label>
            <input type="email" id="cemail" name="email" required>
            <label for="csubject">Subject</label>
            <input type="text" id="csubject" name="subject" required>
            <label for="cmessage">Message</label>
            <textarea id="cmessage" name="message" required></textarea>
            <input class="submit" type="submit" value="submit">
          </form>

<?php

if (isset($_POST['submit'])) {
    $name = $_POST['name'];
    $mailFrom = $_POST['email'];
    $subject = $_POST['subject'];
    $message = $_POST['message'];

    $mailTo = "database@terrytowell.com";
    $headers = "From: ".$mailFrom;
    $txt = "You have received an Email from ".$name.".\n\n".$message;

    mail($mailTo, $subject, $txt, $headers);
    header("Location: ../index.html");
}

?>