Mass campaign: recipient address in subject, body, and link (untrusted sender)

type.inbound
and length(recipients.to) + length(recipients.bcc) + length(recipients.cc) == 1

// exclude To: Undisclosed recipients:;
// since we won't have a valid recipient email
and any(recipients.to, .email.domain.valid == true)
and (
  profile.by_sender().prevalence in ("new", "outlier")
  or (
    profile.by_sender().any_messages_malicious_or_spam
    and not profile.by_sender().any_messages_benign
  )
)
and (
  any(recipients.to,
      (
        strings.icontains(subject.subject, .email.email)
        or strings.icontains(subject.subject, .email.local_part)
      )
      and (
        .email.domain.valid or strings.icontains(.display_name, "undisclosed")
      )
  )
)
and any(recipients.to,
        strings.icontains(body.current_thread.text, .email.email)
)
and any(body.links,
        any(recipients.to,
            strings.icontains(..href_url.query_params, .email.email)
        )
        and (
          (
            not strings.icontains(.display_text, "unsubscribe")
            and not strings.icontains(.href_url.path, "unsubscribe")
          )
        )
)
and any(ml.nlu_classifier(body.current_thread.text).intents,
        .name in ("cred_theft") and .confidence == "high"
)

// negate highly trusted sender domains unless they fail DMARC authentication
and (
  (
    sender.email.domain.root_domain in $high_trust_sender_root_domains
    and not headers.auth_summary.dmarc.pass
  )
  or sender.email.domain.root_domain not in $high_trust_sender_root_domains
)