PHPMailer\PHPMailer

PHPMailer::isSMTP │ public │ WP 1.0

Send messages using SMTP.

Method of the class: PHPMailer{}

No Hooks.

Returns

null. Nothing (null).

Usage

$PHPMailer = new PHPMailer();
$PHPMailer->isSMTP();

PHPMailer::isSMTP() code WP 7.1.2

wp-includes/PHPMailer/PHPMailer.php 
public function isSMTP()
{
    $this->Mailer = 'smtp';
}