Envio de e-mail na caixa de entrada com Php Mailer

send-phpmailer.php

require 'vendor/autoload.php';

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

$mail = new PHPMailer(true);
$mail->CharSet = 'UTF-8';
$mail->setLanguage('pt_br');
$mail->SMTPDebug = 0;
$mail->isSMTP();
$mail->Host       = 'mail.caqo.com.br';
$mail->SMTPAuth   = true;
$mail->Username   = '[email protected]';
$mail->Password   = 'xxx';
$mail->SMTPSecure = 'tls';
$mail->Port       = 587;
$mail->Subject = 'Assunto da mensagem';
$mail->isHTML(true);

$mail->setFrom($mail->Username, 'CAQO Marketing');
$mail->addAddress('[email protected]', 'Nome que recebe');

$message = 'html da mensagem';

$mail->Body    = $message;
$mail->AltBody = ''; // versão txt do e-mail (sem html)

$mail->send();