<?php
date_default_timezone_set('America/Los_Angeles');

use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\SMTP;
use PHPMailer\PHPMailer\Exception;


include_once("src/PHPMailer.php");
include_once("src/SMTP.php");
include_once("src/Exception.php");


$mail = new PHPMailer;
$mail->SMTPDebug = 1;
$mail->Port = 587;

$mail->IsSMTP();
$mail->Host = 'mail.mymail.com';
$mail->SMTPAuth = true;
$mail->Username = 'admin@mymail.com';
$mail->Password = 'Pa55word';
$mail->SMTPSecure = ''; // tried ssl and tls, with same result

$mail->ClearAddresses();
$mail->AddAddress('testmail@gmail.com', 'tester1');
$mail->From = "admin@mymail.com";
$mail->FromName = "Username";
$mail->Subject = 'Hi there';
$mail->Body = "This is a test message";

if ($mail->Send()) {
    echo "Message sent!\n";
}
else {
    echo "Message failed!\n";
    print_r($mail->ErrorInfo);
}

exit();
?>