diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -1485,12 +1485,14 @@
     'HeraldRemarkupFieldValue' => 'applications/herald/value/HeraldRemarkupFieldValue.php',
     'HeraldRemarkupRule' => 'applications/herald/remarkup/HeraldRemarkupRule.php',
     'HeraldRule' => 'applications/herald/storage/HeraldRule.php',
+    'HeraldRuleAdapter' => 'applications/herald/adapter/HeraldRuleAdapter.php',
     'HeraldRuleController' => 'applications/herald/controller/HeraldRuleController.php',
     'HeraldRuleDatasource' => 'applications/herald/typeahead/HeraldRuleDatasource.php',
     'HeraldRuleEditor' => 'applications/herald/editor/HeraldRuleEditor.php',
     'HeraldRuleListController' => 'applications/herald/controller/HeraldRuleListController.php',
     'HeraldRulePHIDType' => 'applications/herald/phid/HeraldRulePHIDType.php',
     'HeraldRuleQuery' => 'applications/herald/query/HeraldRuleQuery.php',
+    'HeraldRuleReplyHandler' => 'applications/herald/mail/HeraldRuleReplyHandler.php',
     'HeraldRuleSearchEngine' => 'applications/herald/query/HeraldRuleSearchEngine.php',
     'HeraldRuleSerializer' => 'applications/herald/editor/HeraldRuleSerializer.php',
     'HeraldRuleTestCase' => 'applications/herald/storage/__tests__/HeraldRuleTestCase.php',
@@ -6918,12 +6920,14 @@
       'PhabricatorDestructibleInterface',
       'PhabricatorSubscribableInterface',
     ),
+    'HeraldRuleAdapter' => 'HeraldAdapter',
     'HeraldRuleController' => 'HeraldController',
     'HeraldRuleDatasource' => 'PhabricatorTypeaheadDatasource',
     'HeraldRuleEditor' => 'PhabricatorApplicationTransactionEditor',
     'HeraldRuleListController' => 'HeraldController',
     'HeraldRulePHIDType' => 'PhabricatorPHIDType',
     'HeraldRuleQuery' => 'PhabricatorCursorPagedPolicyAwareQuery',
+    'HeraldRuleReplyHandler' => 'PhabricatorApplicationTransactionReplyHandler',
     'HeraldRuleSearchEngine' => 'PhabricatorApplicationSearchEngine',
     'HeraldRuleSerializer' => 'Phobject',
     'HeraldRuleTestCase' => 'PhabricatorTestCase',
diff --git a/src/applications/herald/adapter/HeraldRuleAdapter.php b/src/applications/herald/adapter/HeraldRuleAdapter.php
new file mode 100644
--- /dev/null
+++ b/src/applications/herald/adapter/HeraldRuleAdapter.php
@@ -0,0 +1,74 @@
+<?php
+
+final class HeraldRuleAdapter extends HeraldAdapter {
+
+  private $rule;
+
+  protected function newObject() {
+    return new HeraldRule();
+  }
+
+  public function getAdapterApplicationClass() {
+    return 'PhabricatorHeraldApplication';
+  }
+
+  public function getAdapterContentDescription() {
+    return pht('React to Herald rules being created or updated.');
+  }
+
+  public function isTestAdapterForObject($object) {
+    return ($object instanceof HeraldRule);
+  }
+
+  public function getAdapterTestDescription() {
+    return pht(
+      'Test rules which run when a another Herald rule is created or '.
+      'updated.');
+  }
+
+  protected function initializeNewAdapter() {
+    $this->rule = $this->newObject();
+  }
+
+  public function supportsApplicationEmail() {
+    return true;
+  }
+
+  public function supportsRuleType($rule_type) {
+    switch ($rule_type) {
+      case HeraldRuleTypeConfig::RULE_TYPE_GLOBAL:
+      case HeraldRuleTypeConfig::RULE_TYPE_PERSONAL:
+        return true;
+      case HeraldRuleTypeConfig::RULE_TYPE_OBJECT:
+      default:
+        return false;
+    }
+  }
+
+  public function setRule(HeraldRule $rule) {
+    $this->rule = $rule;
+    return $this;
+  }
+
+  public function getRule() {
+    return $this->rule;
+  }
+
+  public function setObject($object) {
+    $this->rule = $object;
+    return $this;
+  }
+
+  public function getObject() {
+    return $this->rule;
+  }
+
+  public function getAdapterContentName() {
+    return pht('Herald Rules');
+  }
+
+  public function getHeraldName() {
+    return $this->getRule()->getMonogram();
+  }
+
+}
diff --git a/src/applications/herald/controller/HeraldRuleController.php b/src/applications/herald/controller/HeraldRuleController.php
--- a/src/applications/herald/controller/HeraldRuleController.php
+++ b/src/applications/herald/controller/HeraldRuleController.php
@@ -374,6 +374,8 @@
           ->applyTransactions($rule, $xactions);
         return array(null, null);
       } catch (Exception $ex) {
+
+        phlog($ex);
         $errors[] = $ex->getMessage();
       }
     }
diff --git a/src/applications/herald/editor/HeraldRuleEditor.php b/src/applications/herald/editor/HeraldRuleEditor.php
--- a/src/applications/herald/editor/HeraldRuleEditor.php
+++ b/src/applications/herald/editor/HeraldRuleEditor.php
@@ -87,4 +87,54 @@
     return;
   }
 
+  protected function shouldApplyHeraldRules(
+    PhabricatorLiskDAO $object,
+    array $xactions) {
+    return true;
+  }
+
+  protected function buildHeraldAdapter(
+    PhabricatorLiskDAO $object,
+    array $xactions) {
+    return id(new HeraldRuleAdapter())
+      ->setRule($object);
+  }
+
+  protected function shouldSendMail(
+    PhabricatorLiskDAO $object,
+    array $xactions) {
+    return true;
+  }
+
+  protected function getMailTo(PhabricatorLiskDAO $object) {
+    $phids = array();
+
+    $phids[] = $this->getActingAsPHID();
+
+    if ($object->isPersonalRule()) {
+      $phids[] = $object->getAuthorPHID();
+    }
+
+    return $phids;
+  }
+
+  protected function buildReplyHandler(PhabricatorLiskDAO $object) {
+    return id(new HeraldRuleReplyHandler())
+      ->setMailReceiver($object);
+  }
+
+  protected function buildMailTemplate(PhabricatorLiskDAO $object) {
+    $monogram = $object->getMonogram();
+    $name = $object->getName();
+
+    $subject = pht('%s: %s', $monogram, $name);
+
+    return id(new PhabricatorMetaMTAMail())
+      ->setSubject($subject);
+  }
+
+  protected function getMailSubjectPrefix() {
+    return pht('[Herald]');
+  }
+
 }
diff --git a/src/applications/herald/mail/HeraldRuleReplyHandler.php b/src/applications/herald/mail/HeraldRuleReplyHandler.php
new file mode 100644
--- /dev/null
+++ b/src/applications/herald/mail/HeraldRuleReplyHandler.php
@@ -0,0 +1,16 @@
+<?php
+
+final class HeraldRuleReplyHandler
+  extends PhabricatorApplicationTransactionReplyHandler {
+
+  public function validateMailReceiver($mail_receiver) {
+    if (!($mail_receiver instanceof HeraldRule)) {
+      throw new Exception(pht('Mail receiver is not a %s!', 'HeraldRule'));
+    }
+  }
+
+  public function getObjectPrefix() {
+    return 'H';
+  }
+
+}