Send Mail with PHPMailer

require("/var/www/html/PHPMailer-master/src/Exception.php");
require("/var/www/html/PHPMailer-master/src/PHPMailer.php");
require("/var/www/html/PHPMailer-master/src/SMTP.php");

$mail = new PHPMailer\PHPMailer\PHPMailer();
$mail->IsSMTP();
$mail->SMTPAuth = false;
$mail->SMTPSecure = false;
$mail->SMTPAutoTLS = false;
$mail->Host = "";
$mail->Port = 25;
$mail->IsHTML(true);
$mail->SetFrom("from@mydomain.tld");
$mail->Subject = "my subject";
$mail->Body = "my body";
$mail->AddAddress("to@anotherdomain.tld");

if(!$mail->Send()) {
     echo "Mailer Error: " . $mail->ErrorInfo;
} else {
     echo "Message has been sent";
}