diff --git a/resources/sql/autopatches/20150622.metamta.1.phid-col.sql b/resources/sql/autopatches/20150622.metamta.1.phid-col.sql
new file mode 100644
--- /dev/null
+++ b/resources/sql/autopatches/20150622.metamta.1.phid-col.sql
@@ -0,0 +1,2 @@
+ALTER TABLE {$NAMESPACE}_metamta.metamta_mail
+  ADD phid VARBINARY(64) NOT NULL AFTER id;
diff --git a/resources/sql/autopatches/20150622.metamta.2.phid-mig.php b/resources/sql/autopatches/20150622.metamta.2.phid-mig.php
new file mode 100644
--- /dev/null
+++ b/resources/sql/autopatches/20150622.metamta.2.phid-mig.php
@@ -0,0 +1,22 @@
+<?php
+
+$table = new PhabricatorMetaMTAMail();
+$conn_w = $table->establishConnection('w');
+
+echo pht('Assigning PHIDs to mails...')."\n";
+foreach (new LiskMigrationIterator($table) as $mail) {
+  $id = $mail->getID();
+
+  echo pht('Updating mail %d...', $id)."\n";
+  if ($mail->getPHID()) {
+    continue;
+  }
+
+  queryfx(
+    $conn_w,
+    'UPDATE %T SET phid = %s WHERE id = %d',
+    $table->getTableName(),
+    $table->generatePHID(),
+    $id);
+}
+echo pht('Done.')."\n";
diff --git a/resources/sql/autopatches/20150622.metamta.3.phid-key.sql b/resources/sql/autopatches/20150622.metamta.3.phid-key.sql
new file mode 100644
--- /dev/null
+++ b/resources/sql/autopatches/20150622.metamta.3.phid-key.sql
@@ -0,0 +1,2 @@
+ALTER TABLE {$NAMESPACE}_metamta.metamta_mail
+  ADD UNIQUE KEY `key_phid` (phid);
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
@@ -2107,6 +2107,8 @@
     'PhabricatorMetaMTAMail' => 'applications/metamta/storage/PhabricatorMetaMTAMail.php',
     'PhabricatorMetaMTAMailBody' => 'applications/metamta/view/PhabricatorMetaMTAMailBody.php',
     'PhabricatorMetaMTAMailBodyTestCase' => 'applications/metamta/view/__tests__/PhabricatorMetaMTAMailBodyTestCase.php',
+    'PhabricatorMetaMTAMailPHIDType' => 'applications/metamta/phid/PhabricatorMetaMTAMailPHIDType.php',
+    'PhabricatorMetaMTAMailQuery' => 'applications/metamta/query/PhabricatorMetaMTAMailQuery.php',
     'PhabricatorMetaMTAMailSection' => 'applications/metamta/view/PhabricatorMetaMTAMailSection.php',
     'PhabricatorMetaMTAMailTestCase' => 'applications/metamta/storage/__tests__/PhabricatorMetaMTAMailTestCase.php',
     'PhabricatorMetaMTAMailableDatasource' => 'applications/metamta/typeahead/PhabricatorMetaMTAMailableDatasource.php',
@@ -5744,9 +5746,14 @@
     'PhabricatorMetaMTAEmailBodyParser' => 'Phobject',
     'PhabricatorMetaMTAEmailBodyParserTestCase' => 'PhabricatorTestCase',
     'PhabricatorMetaMTAErrorMailAction' => 'PhabricatorSystemAction',
-    'PhabricatorMetaMTAMail' => 'PhabricatorMetaMTADAO',
+    'PhabricatorMetaMTAMail' => array(
+      'PhabricatorMetaMTADAO',
+      'PhabricatorPolicyInterface',
+    ),
     'PhabricatorMetaMTAMailBody' => 'Phobject',
     'PhabricatorMetaMTAMailBodyTestCase' => 'PhabricatorTestCase',
+    'PhabricatorMetaMTAMailPHIDType' => 'PhabricatorPHIDType',
+    'PhabricatorMetaMTAMailQuery' => 'PhabricatorCursorPagedPolicyAwareQuery',
     'PhabricatorMetaMTAMailSection' => 'Phobject',
     'PhabricatorMetaMTAMailTestCase' => 'PhabricatorTestCase',
     'PhabricatorMetaMTAMailableDatasource' => 'PhabricatorTypeaheadCompositeDatasource',
diff --git a/src/applications/metamta/phid/PhabricatorMetaMTAMailPHIDType.php b/src/applications/metamta/phid/PhabricatorMetaMTAMailPHIDType.php
new file mode 100644
--- /dev/null
+++ b/src/applications/metamta/phid/PhabricatorMetaMTAMailPHIDType.php
@@ -0,0 +1,43 @@
+<?php
+
+final class PhabricatorMetaMTAMailPHIDType extends PhabricatorPHIDType {
+
+  const TYPECONST = 'MTAM';
+
+  public function getTypeName() {
+    return pht('MetaMTA Mail');
+  }
+
+  public function getPHIDTypeApplicationClass() {
+    return 'PhabricatorMetaMTAApplication';
+  }
+
+  public function newObject() {
+    return new PhabricatorMetaMTAMail();
+  }
+
+  protected function buildQueryForObjects(
+    PhabricatorObjectQuery $query,
+    array $phids) {
+
+    return id(new PhabricatorMetaMTAMailQuery())
+      ->withPHIDs($phids);
+  }
+
+  public function loadHandles(
+    PhabricatorHandleQuery $query,
+    array $handles,
+    array $objects) {
+
+    foreach ($handles as $phid => $handle) {
+      $mail = $objects[$phid];
+
+      $id = $mail->getID();
+      $name = pht('Mail %d', $id);
+
+      $handle
+        ->setName($name)
+        ->setFullName($name);
+    }
+  }
+}
diff --git a/src/applications/metamta/query/PhabricatorMetaMTAMailQuery.php b/src/applications/metamta/query/PhabricatorMetaMTAMailQuery.php
new file mode 100644
--- /dev/null
+++ b/src/applications/metamta/query/PhabricatorMetaMTAMailQuery.php
@@ -0,0 +1,57 @@
+<?php
+
+final class PhabricatorMetaMTAMailQuery
+  extends PhabricatorCursorPagedPolicyAwareQuery {
+
+  private $ids;
+  private $phids;
+
+  public function withIDs(array $ids) {
+    $this->ids = $ids;
+    return $this;
+  }
+
+  public function withPHIDs(array $phids) {
+    $this->phids = $phids;
+    return $this;
+  }
+
+  protected function loadPage() {
+    return $this->loadStandardPage($this->newResultObject());
+  }
+
+  protected function buildWhereClause(AphrontDatabaseConnection $conn_r) {
+    $where = array();
+
+    if ($this->ids !== null) {
+      $where[] = qsprintf(
+        $conn_r,
+        'mail.id IN (%Ld)',
+        $this->ids);
+    }
+
+    if ($this->phids !== null) {
+      $where[] = qsprintf(
+        $conn_r,
+        'mail.phid IN (%Ls)',
+        $this->phids);
+    }
+
+    $where[] = $this->buildPagingClause($conn_r);
+
+    return $this->formatWhereClause($where);
+  }
+
+  protected function getPrimaryTableAlias() {
+    return 'mail';
+  }
+
+  public function newResultObject() {
+    return new PhabricatorMetaMTAMail();
+  }
+
+  public function getQueryApplicationClass() {
+    return 'PhabricatorMetaMTAApplication';
+  }
+
+}
diff --git a/src/applications/metamta/storage/PhabricatorMetaMTAMail.php b/src/applications/metamta/storage/PhabricatorMetaMTAMail.php
--- a/src/applications/metamta/storage/PhabricatorMetaMTAMail.php
+++ b/src/applications/metamta/storage/PhabricatorMetaMTAMail.php
@@ -3,7 +3,9 @@
 /**
  * @task recipients   Managing Recipients
  */
-final class PhabricatorMetaMTAMail extends PhabricatorMetaMTADAO {
+final class PhabricatorMetaMTAMail
+  extends PhabricatorMetaMTADAO
+  implements PhabricatorPolicyInterface {
 
   const STATUS_QUEUE = 'queued';
   const STATUS_SENT  = 'sent';
@@ -29,6 +31,7 @@
 
   protected function getConfiguration() {
     return array(
+      self::CONFIG_AUX_PHID => true,
       self::CONFIG_SERIALIZATION => array(
         'parameters'  => self::SERIALIZATION_JSON,
       ),
@@ -54,6 +57,11 @@
     ) + parent::getConfiguration();
   }
 
+  public function generatePHID() {
+    return PhabricatorPHID::generateNewPHID(
+      PhabricatorMetaMTAMailPHIDType::TYPECONST);
+  }
+
   protected function setParam($param, $value) {
     $this->parameters[$param] = $value;
     return $this;
@@ -993,4 +1001,29 @@
   }
 
 
+/* -(  PhabricatorPolicyInterface  )----------------------------------------- */
+
+
+  public function getCapabilities() {
+    return array(
+      PhabricatorPolicyCapability::CAN_VIEW,
+    );
+  }
+
+  public function getPolicy($capability) {
+    return PhabricatorPolicies::POLICY_NOONE;
+  }
+
+  public function hasAutomaticCapability($capability, PhabricatorUser $viewer) {
+    $actor_phids = $this->getAllActorPHIDs();
+    $actor_phids = $this->expandRecipients($actor_phids);
+    return in_array($viewer->getPHID(), $actor_phids);
+  }
+
+  public function describeAutomaticCapability($capability) {
+    return pht(
+      'The mail sender and message recipients can always see the mail.');
+  }
+
+
 }