def METHOD_NAME():
    system_emails = get_emails_to_never_bounce()
    general_bounces = (
        BouncedEmail.objects
        .filter(email__in=system_emails)
        .values_list('email', flat=True)
    )
    transient_bounces = (
        TransientBounceEmail.objects
        .filter(email__in=system_emails)
        .values_list('email', flat=True)
    )
    return list(general_bounces) + list(transient_bounces)