diff --git a/src/infrastructure/markup/rule/PhabricatorObjectRemarkupRule.php b/src/infrastructure/markup/rule/PhabricatorObjectRemarkupRule.php
--- a/src/infrastructure/markup/rule/PhabricatorObjectRemarkupRule.php
+++ b/src/infrastructure/markup/rule/PhabricatorObjectRemarkupRule.php
@@ -9,7 +9,7 @@
   abstract protected function loadObjects(array $ids);
 
   public function getPriority() {
-    return 450.0;
+    return 350.0;
   }
 
   protected function getObjectNamePrefixBeginsWithWordCharacter() {
@@ -53,7 +53,7 @@
     return $uri;
   }
 
-  protected function renderObjectRefForAnyMedia (
+  protected function renderObjectRefForAnyMedia(
     $object,
     PhabricatorObjectHandle $handle,
     $anchor,
@@ -129,7 +129,7 @@
     $status_closed = PhabricatorObjectHandle::STATUS_CLOSED;
     $attr = array(
       'phid' => $handle->getPHID(),
-      'closed'  => ($handle->getStatus() == $status_closed),
+      'closed' => ($handle->getStatus() == $status_closed),
     );
 
     return $this->renderHovertag($name, $href, $attr);
@@ -189,7 +189,12 @@
     $prefix = preg_quote($prefix);
     $id = $this->getObjectIDPattern();
 
-    return '(\B{'.$prefix.'('.$id.')([,\s](?:[^}\\\\]|\\\\.)*)?}\B)u';
+    return
+      '(\B{'.
+      '([a-zA-Z]+://\w+\.\w+/)?'.
+      $prefix.'('.$id.')'.
+      '([,\s](?:[^}\\\\]|\\\\.)*)?'.
+      '}\B)u';
   }
 
   private function getObjectReferencePattern() {
@@ -211,11 +216,14 @@
 
     // The "(?<![#-])" prevents us from linking "#abcdef" or similar, and
     // "ABC-T1" (see T5714).
-
+    //
     // The "\b" allows us to link "(abcdef)" or similar without linking things
     // in the middle of words.
-
-    return '((?<![#-])'.$boundary.$prefix.'('.$id.')(?:#([-\w\d]+))?(?!\w))u';
+    return
+      '((?<![#-=/\?&])'.$boundary.
+      '([a-zA-Z]+://\w+\.\w+/)?'.
+      $prefix.'('.$id.')'.
+      '(?:#([-\w\d]+))?(?![\w/]))u';
   }
 
 
@@ -252,11 +260,11 @@
       $formatted = array();
       foreach ($matches as $match) {
         $format = array(
-          'offset' => $match[1][1],
-          'id' => $match[1][0],
+          'offset' => $match[2][1],
+          'id' => $match[2][0],
         );
-        if (isset($match[2][0])) {
-          $format['tail'] = $match[2][0];
+        if (isset($match[3][0])) {
+          $format['tail'] = $match[3][0];
         }
         $formatted[] = $format;
       }
@@ -271,10 +279,21 @@
       return $matches[0];
     }
 
+    if ($matches[1]) {
+      $uri = new PhutilURI($matches[1]);
+
+      $base_uri = PhabricatorEnv::getEnvConfig('phabricator.base-uri');
+      $base_uri = new PhutilURI($base_uri);
+
+      if (strtolower($uri->getDomain()) != strtolower($base_uri->getDomain())) {
+        return $matches[0];
+      }
+    }
+
     return $this->markupObject(array(
       'type' => 'embed',
-      'id' => $matches[1],
-      'options' => idx($matches, 2),
+      'id' => $matches[2],
+      'options' => idx($matches, 3),
       'original' => $matches[0],
     ));
   }
@@ -284,10 +303,21 @@
       return $matches[0];
     }
 
+    if ($matches[1]) {
+      $uri = new PhutilURI($matches[1]);
+
+      $base_uri = PhabricatorEnv::getEnvConfig('phabricator.base-uri');
+      $base_uri = new PhutilURI($base_uri);
+
+      if (strtolower($uri->getDomain()) != strtolower($base_uri->getDomain())) {
+        return $matches[0];
+      }
+    }
+
     return $this->markupObject(array(
       'type' => 'ref',
-      'id' => $matches[1],
-      'anchor' => idx($matches, 2),
+      'id' => $matches[2],
+      'anchor' => idx($matches, 3),
       'original' => $matches[0],
     ));
   }