diff --git a/detection-rules/recipients_undisclosed_compauth_check.yml b/detection-rules/recipients_undisclosed_compauth_check.yml
index bf7b2ffbd88..b09805eb138 100644
--- a/detection-rules/recipients_undisclosed_compauth_check.yml
+++ b/detection-rules/recipients_undisclosed_compauth_check.yml
@@ -27,6 +27,25 @@ source: |
       )
     )
   )
+  and (
+    profile.by_sender().prevalence in ("new", "outlier")
+    or (
+      profile.by_sender().any_messages_malicious_or_spam
+      and not profile.by_sender().any_false_positives
+    )
+  )
+  // negate highly trusted sender domains unless they fail DMARC authentication
+  and (
+    (
+      sender.email.domain.root_domain in $high_trust_sender_root_domains
+      and (
+        any(distinct(headers.hops, .authentication_results.dmarc is not null),
+            strings.ilike(.authentication_results.dmarc, "*fail")
+        )
+      )
+    )
+    or sender.email.domain.root_domain not in $high_trust_sender_root_domains
+  )
 detection_methods:
   - "Content analysis"
   - "Computer Vision"