Validate an email address in Drupal 8

$emails = [
  'info@dribbit.eu',
  'infodribbit.eu',
  'info@dritbbit'
];

foreach($emails as $email) {
  if(!\Drupal::service('email.validator')->isValid($email)) {
    drupal_set_message(
      $this->t('Incorrect email address: @email',
        [
          '@email' => $email,
        ]
      )
    );
  }
}

Only the second email address is invalid.