I'm using the following php script on a contact form but it is neither sending emails or redirecting -
<?php
  if (isset($_POST['submit'])) {
      $jobtype = $_POST['jobtype'];
      $name = $_POST['name'];
      $email = $_POST['email'];
      $message = $_POST['message'];
      
      $mailto = "myemail";
      $email_subject = "Contact form submission: $name";
      $email_body = "You have received a new message. ".
      " Here are the details:\n $jobtype \n Name: $name \n ".
      "Email: $email \n Message \n $message";
      
      mail($mailto, $email_subject, $email_body,);
      header("Location: thank-you.html?mailsend");
  }
  ?>  
The contact form is as follows -
  <form action="/contact.php" method="POST">
  
        <label for="jobtype">What can I do for you?</label>
      <select id="jobtype" name="jobtype">
        <option value="web-design">Web Design</option>
        <option value="logo-design">Logo Design</option>
        <option value="graphic-design">Graphic Design</option>
        <option value="photo-video">Photography/Video</option>
        <option value="general-enquiry">General Enquiry</option>
      </select>
      <label for="name">Who are you?</label>
      <input type="text" id="name" name="name" placeholder="Your name is..">
  
      <label for="email">Your email?</label>
      <input type="text" id="email" name="email" placeholder="Your email is..">
  
      <label for="message">A quick description of the job</label>
      <textarea id="message" name="message" placeholder="Let me know here.." style="height:200px"></textarea>
  
      <input type="submit" value="Submit">
    </form>
I've tried some of the fixes on here but none seem to work, any help is appreciated!
