Open redirect: smartadserver.com

type.inbound
// smartadserver is used in benign messages, however, they commonly have many links
// ensure messages contain less than 15 links to ensure higher fidelity matching of malicious messages
and length(body.links) < 15
and any(body.links,
        .href_url.domain.root_domain == "smartadserver.com"
        and strings.icontains(.href_url.query_params, 'go=')
        and not regex.icontains(.href_url.query_params,
                                'go=(?:https?(?:%3a|:))?(?:%2f|\/){2}[^&]*smartadserver\.com(?:\&|\/|$|%2f)'
        )
)
// remove uses that originate from smartadserver.com
and not any(headers.domains, .root_domain == "smartadserver.com")
// 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
)