Why does my PHP code send some empty emails and some filled out? [duplicate]

The problem is that when a user sends a filled out form I am receiving empty emails, not even the form outline - completely empty besides the subject line. All the id's from the form match the $_POST data in PHP so I am not sure why it is sending empty emails. Does the mail function not work very well?

My HTML:

<form method="post" action="message-sent.php" id="contactForm">
            <p>Send us a message!</p>
            <input type="hidden" name="subject" value="Message from
              gamestogo.ca">
            <div>
              <div>
                <input
                  name="fullname" type="text" placeholder="Full Name"
                  id="fullName">
              </div>
              <div>
                <input
                  name="phone" type="tel" placeholder="Phone Number"
                  id="phoneNum">
              </div>
              <div>
                <input
                  name="email" type="email" placeholder="Email" id="email"
                  required>
              </div>
              <div>
                <input
                  name="neighbourhood" type="text" placeholder="Neighbourhood"
                  id="neighbourhood" required>
              </div>
              <div>
                <input
                  name="people" type="text"
                  placeholder="Approximate Number of People"
                  id="numPeople" required>
              </div>
              <div>
                <input
                  name="preferreddate" type="text"
                  placeholder="Preferred Date & Time"
                  id="date">
              </div>
              <div>
                <select
                  name="serviceStyle" placeholder="Preferred Service Style"
                  id="serviceStyle">
                  <option value="">Your preferred service style</option>
                  <option value="Not Sure" style="padding-top: 1.5rem;
                    padding-bottom: 1.5rem;">Not Sure</option>
                  <option value="Curbside">Curbside - Gaming party outside your
                    home</option>
                  <option value="In-House">In-House - Gaming party inside your
                    home</option>
                </select>
              </div>
              <div>
                <textarea 
                  name="comment" id="comments" rows="6"
                  placeholder="Any Questions?"></textarea>
              </div>
              <button name="submit">Send Message</button>
            </div>
</form>

My PHP:

<?php
    $now = date("D M j G:i:s T Y");
    $toAddress = "info@gamestogo.ca";
    $from = $_POST['email'];
    $fromAddress = "From:" . $from ."\r\n" .
       "Reply-To:" . $_POST['email'] . "\r\n" .
       "X-Mailer: PHP/" . phpversion();

    if($from <> ""){
        $body  = "Please find your message from gamestogo.ca below:\n\n";
        $body .= "From: " . $_POST['fullname'] . "\n";
        $body .= "Phone: " . $_POST['phone'] . "\n";
        $body .= "Email: " . $_POST['email'] . "\n";
        $body .= "Neighbourhood: " . $_POST['neighbourhood'] . "\n";
        $body .= "Preferred Service Style: " . $_POST['serviceStyle'] . "\n";
        $body .= "Number of people: " . $_POST['people'] . "\n";
        $body .= "Preferred Date: " . $_POST['preferreddate'] . "\n";
        $body .= "Comments: " . $_POST['comment'] . "\n";

        mail($toAddress, "Form Submit from gamestogo.ca.", $body, $fromAddress);

        $arr = array ('success'=>true, 'message'=>"Thank you for your inquiry, we'll get back to you soon.");
        header('Location: confirmation.html');
        exit();
    }
    else{
        $arr = array ('success'=>false, 'message'=>"Please fill in required fields.");
        header('Location: error.html');
        exit();
    }