$mail = new PHPMailer(); // create a new object
$mail->SMTPDebug = 1; // debugging: 1 = errors and messages, 2 = messages only
$mail->SMTPAuth = true; // authentication enabled
$mail->SMTPSecure = 'ssl'; // secure transfer enabled REQUIRED for GMail
$mail->Host = "XXX.XXX.XXX.XXX";
$mail->Port = XXX; // or 587
$mail->IsHTML(true);
$mail->Username = "XXX@xyz.com";
$subject = 'verfication email';
$mail->Password = "XXXXXX";
$mail->SetFrom('XXX@xyz.com');
$mail->Subject = $subject;
$user_login = $user->user_login;
$user_id = $user->ID;
$email = $user->user_email;
$mail->addAddress($email);

  $mail->Body =  'Welome'.'<br>'.'Kindly Click On Below link to activate your account';

 if(!$mail->Send())
 {
 echo "Mailer Error: " . $mail->ErrorInfo;
 }
 else
 {
echo 'Thank you for registering ' . $user->user_login;
echo '<br/>Kindly verify your email.'.$email;

       } // great Thanks to **Harneet Kaur**