Spam: Sexually explicit content with emoji in subject from freemail provider

type.inbound
// sender is a freemail domain
and sender.email.domain.root_domain in $free_email_providers
// look for commonly used emojis in sexually explicit messages
and regex.icontains(subject.subject,
                    '(\x{1F346}|\x{1F608}|\x{1F609}|\x{1F351}|\x{2764}|\x{1F60D}|\x{1F618}|\x{1F48B}|\x{1F63B}|\x{1F445}|\x{1F51E}|\x{1F525}|\x{1F4F7})'
)
and any(ml.nlu_classifier(body.current_thread.text).topics,
        .name == 'Sexually Explicit Messages'
)