Validate email method in phpMailer library always returning false.

<?php 
//Form is submitted to the same page
if($_SERVER["REQUEST_METHOD"] == "POST"){
    $name = trim(filter_input(INPUT_POST,"name",FILTER_SANITIZE_STRING));
    $email = trim(filter_input(INPUT_POST,"name",FILTER_SANITIZE_EMAIL));
    $details = trim(filter_input(INPUT_POST,"name",FILTER_SANITIZE_SPECIAL_CHARS));
//Validation
    if($name == "" OR $email == "" OR $details == ""){
        echo "Please fill in the required fields: Name, Email, Message";
        exit;
    }
    if($_POST["address"]!=""){
        echo "Bad input";
        exit;
    }
    require("inc/PhpMailer/class.phpmailer.php");
    $mail = new PHPMailer;
    //Validate email
    if(!$mail->validateAddress($email)){
        echo "Invalid Email Address";
        exit;
    }