Enviando Email com PHPMailer

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

  require 'phpmailer/vendor/phpmailer/phpmailer/src/Exception.php';
  require 'phpmailer/vendor/phpmailer/phpmailer/src/PHPMailer.php';
  require 'phpmailer/vendor/phpmailer/phpmailer/src/SMTP.php';
  require 'phpmailer/vendor/autoload.php';

  $mail = new PHPMailer(true);
  $USERNAME = "SEU EMAIL AQUI";
  $PASSWORD = "A SENHA DO SEU EMAIL AQUI";
  $NAME_FROM = "NOME";
  $mail->WordWrap = 50;
  $mail->isHTML(true);
  $mail->SMTPSecure = 'ssl';
  $mail->isSMTP();
  $mail->SMTPDebug = 0;
  $mail->Host = 'smtp.gmail.com';
  $mail->Port = 465;
  $mail->SMTPAuth = true;
  $mail->SMTPOptions = array(
      'ssl' => array(
          'verify_peer' => false,
          'verify_peer_name' => false,
          'allow_self_signed' => false
      )
  );

  $email_destino_principal = "xxxxxxxx@xxxxxxxx.com";
  $email_destino_secundario = "xxxxxxxx@xxxxxxxx.com";

  $html = "AQUI VOCÊ COLOCA O CONTEÚDO DA MENSAGEM";

  try {

    $subject        = "AQUI O ASSUNTO";
    $mail->Username = $USERNAME;
    $mail->Password =$PASSWORD;
    $mail->setFrom($USERNAME,$NAME_FROM);
    $mail->addAddress($email_destino_principal);
    $mail->AddCC($email_destino_secundario);

    $mail->Subject = ($subject);
    $mail->msgHTML($html);
    $mail->send();
    echo 'Email enviado com suesso!';
  } catch (Exception $e) {
      echo 'Não foi possível enviar email';
      echo 'Aconteceu o seguinte erro: ' . $mail->ErrorInfo;
  }