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'
)