def METHOD_NAME(sender, batch=False, **kwargs):
    welcome = getattr(settings, "NEWSLETTER_WELCOME_MAILINTENT", None)
    if not welcome:
        return
    if batch:
        return
    if not sender.subscribed:
        return
    for nl_slug, intent_id in welcome.items():
        if sender.newsletter.slug != nl_slug:
            continue
        intent = mail_registry.get_intent(intent_id)
        if not intent:
            return
        sender.send_mail_intent(intent)