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
@@ -4921,6 +4921,7 @@
     'PhabricatorSubscriptionsListController' => 'applications/subscriptions/controller/PhabricatorSubscriptionsListController.php',
     'PhabricatorSubscriptionsMailEngineExtension' => 'applications/subscriptions/engineextension/PhabricatorSubscriptionsMailEngineExtension.php',
     'PhabricatorSubscriptionsMuteController' => 'applications/subscriptions/controller/PhabricatorSubscriptionsMuteController.php',
+    'PhabricatorSubscriptionsMuteEmailCommand' => 'applications/subscriptions/command/PhabricatorSubscriptionsMuteEmailCommand.php',
     'PhabricatorSubscriptionsRemoveSelfHeraldAction' => 'applications/subscriptions/herald/PhabricatorSubscriptionsRemoveSelfHeraldAction.php',
     'PhabricatorSubscriptionsRemoveSubscribersHeraldAction' => 'applications/subscriptions/herald/PhabricatorSubscriptionsRemoveSubscribersHeraldAction.php',
     'PhabricatorSubscriptionsSearchEngineAttachment' => 'applications/subscriptions/engineextension/PhabricatorSubscriptionsSearchEngineAttachment.php',
@@ -11707,6 +11708,7 @@
     'PhabricatorSubscriptionsListController' => 'PhabricatorController',
     'PhabricatorSubscriptionsMailEngineExtension' => 'PhabricatorMailEngineExtension',
     'PhabricatorSubscriptionsMuteController' => 'PhabricatorController',
+    'PhabricatorSubscriptionsMuteEmailCommand' => 'MetaMTAEmailTransactionCommand',
     'PhabricatorSubscriptionsRemoveSelfHeraldAction' => 'PhabricatorSubscriptionsHeraldAction',
     'PhabricatorSubscriptionsRemoveSubscribersHeraldAction' => 'PhabricatorSubscriptionsHeraldAction',
     'PhabricatorSubscriptionsSearchEngineAttachment' => 'PhabricatorSearchEngineAttachment',
diff --git a/src/applications/subscriptions/command/PhabricatorSubscriptionsMuteEmailCommand.php b/src/applications/subscriptions/command/PhabricatorSubscriptionsMuteEmailCommand.php
new file mode 100644
--- /dev/null
+++ b/src/applications/subscriptions/command/PhabricatorSubscriptionsMuteEmailCommand.php
@@ -0,0 +1,49 @@
+<?php
+
+final class PhabricatorSubscriptionsMuteEmailCommand
+  extends MetaMTAEmailTransactionCommand {
+
+  public function getCommand() {
+    return 'mute';
+  }
+
+  public function getCommandSummary() {
+    return pht('Mute notifications from this object.');
+  }
+
+  public function isCommandSupportedForObject(
+    PhabricatorApplicationTransactionInterface $object) {
+    return ($object instanceof PhabricatorSubscribableInterface);
+  }
+
+  public function buildTransactions(
+    PhabricatorUser $viewer,
+    PhabricatorApplicationTransactionInterface $object,
+    PhabricatorMetaMTAReceivedMail $mail,
+    $command,
+    array $argv) {
+    $xactions = array();
+
+    $muted_type = PhabricatorMutedByEdgeType::EDGECONST;
+
+    $xactions[] = id($object->getApplicationTransactionTemplate())
+      ->setTransactionType(PhabricatorTransactions::TYPE_EDGE)
+      ->setMetadataValue('edge:type', $muted_type)
+      ->setNewValue(
+        array(
+          '+' => array_fuse(array($viewer->getPHID())),
+        ));
+
+    // we need to immediatelly unsubscribe because otherwise subscription
+    // will be added by ReplyHandler
+    $xactions[] = $object->getApplicationTransactionTemplate()
+      ->setTransactionType(PhabricatorTransactions::TYPE_SUBSCRIBERS)
+      ->setNewValue(
+        array(
+          '-' => array($viewer->getPHID()),
+        ));
+
+    return $xactions;
+  }
+
+}