Using Object and Validating Email errors with PHPMailer

<?php 
//Import the PHPMailer class into the global namespace
use PHPMailer\PHPMailer\PHPMailer;
require 'vendor/phpmailer/src/PHPMailer.php';
require 'vendor/phpmailer/src/Exception.php';

if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $name = trim(filter_input(INPUT_POST,"name",FILTER_SANITIZE_STRING));
    $email = trim(filter_input(INPUT_POST,"email",FILTER_SANITIZE_EMAIL));
    $details = trim(filter_input(INPUT_POST,"details",FILTER_SANITIZE_SPECIAL_CHARS));

    if ($name =="" || $email == "" || $detials == "") {
        echo "Please fill in the required fields: Name, Email, and Details";
        exit;
    }
    if($_POST("address") != "") {
        echo "Bad form input";
        exit;
      }
      if (!PHPMailer::validateAddress($email)) {
          echo "Invalid Email Address";
          exit;
      }
    echo "<pre>";
    $email_body = "";
    $email_body .= "Name " . $name . "\n";
    $email_body .=  "Email " . $email . "\n";
    $email_body .=  "Details " . $details . "\n";
    echo $email_body;
    echo "</pre>";

    //To Do: Send email
    header("location:suggest.php?status=thanks");
  }

$pageTitle = "Suggest a Media Item";
$section = "suggest";

include("inc/header.php"); ?>

<div class="section page">
  <div class="wrapper">
    <h1>Suggest a Media Item</h1>
    <?php if (isset($_GET["status"]) && $_GET["status"] == "thanks") {
        echo "<p>Thanks for the email! I&rsquo;ll check out your suggestion shortly!</p>";
    } else { ?>

    <p> If you think there is something I&rsquo;m missing, let me know! Complete the form to send me an email.</p>
    <form method="post" action="suggest.php">
        <table>
        <tr>
            <th><label for="name">Name</label></th>
            <td><input type="text" id="name" name="name" /></td>
        </tr>
        <tr>
            <th><label for="email">Email</label></th>
            <td><input type="text" id="name" name="email" /></td>
        </tr>
        <tr>
            <th><label for="details">Suggest Item Details</label></th>
            <td><textarea name="details" id="details"></textarea></td>
        </tr>
        <tr style="display:none">
            <th><label for="address">Email</label></th>
            <td><input type="text" id="address" name="address" />
          <p>Please leave this field blank</p></td>
        </tr>
        </table>
        <input type="submit" value="Send" />
    </form>
    <?php } ?>
    </div>
</div>

<?php include("inc/footer.php"); ?>