$mail->SMTPAuth = true;
define('PHPMAILERHOST', 'tonyfintech.info');
$phpmailer_smtpuser = 'info@tonyfintech.info';
$phpmailer_smtppassword = 'azerty123';
$phpmailer_smtpport = '587';

$phpmailer_smtpsecure = 'tls';
$mail->SMTPOptions = array(
        'ssl' => array(
            'verify_peer' => false,
            'verify_peer_name' => false,
            'allow_self_signed' => false
        )
    );


define('TEST', 0);
define('PHPMAILER_SMTP_DEBUG', 1);

I still have this error:
2018-10-30 21:04:23 CLIENT -> SERVER: EHLO tonyfintech.info
2018-10-30 21:04:23 CLIENT -> SERVER: STARTTLS
SMTP Error: Could not connect to SMTP host.
2018-10-30 21:04:23 CLIENT -> SERVER: QUIT