diff --git a/src/applications/differential/herald/DifferentialReviewersAddBlockingReviewersHeraldAction.php b/src/applications/differential/herald/DifferentialReviewersAddBlockingReviewersHeraldAction.php
--- a/src/applications/differential/herald/DifferentialReviewersAddBlockingReviewersHeraldAction.php
+++ b/src/applications/differential/herald/DifferentialReviewersAddBlockingReviewersHeraldAction.php
@@ -22,7 +22,7 @@
   }
 
   protected function getDatasource() {
-    return new PhabricatorMetaMTAMailableDatasource();
+    return new DiffusionAuditorDatasource();
   }
 
   public function renderActionDescription($value) {
diff --git a/src/applications/differential/herald/DifferentialReviewersAddReviewersHeraldAction.php b/src/applications/differential/herald/DifferentialReviewersAddReviewersHeraldAction.php
--- a/src/applications/differential/herald/DifferentialReviewersAddReviewersHeraldAction.php
+++ b/src/applications/differential/herald/DifferentialReviewersAddReviewersHeraldAction.php
@@ -22,7 +22,7 @@
   }
 
   protected function getDatasource() {
-    return new PhabricatorMetaMTAMailableDatasource();
+    return new DiffusionAuditorDatasource();
   }
 
   public function renderActionDescription($value) {
diff --git a/src/applications/differential/herald/DifferentialReviewersHeraldAction.php b/src/applications/differential/herald/DifferentialReviewersHeraldAction.php
--- a/src/applications/differential/herald/DifferentialReviewersHeraldAction.php
+++ b/src/applications/differential/herald/DifferentialReviewersHeraldAction.php
@@ -69,6 +69,7 @@
     $allowed_types = array(
       PhabricatorPeopleUserPHIDType::TYPECONST,
       PhabricatorProjectProjectPHIDType::TYPECONST,
+      PhabricatorOwnersPackagePHIDType::TYPECONST,
     );
 
     $targets = $this->loadStandardTargets($phids, $allowed_types, $current);