diff --git a/src/ApacheMimetypeHelper.php b/src/ApacheMimetypeHelper.php
index 764dd7c..1454065 100644
--- a/src/ApacheMimetypeHelper.php
+++ b/src/ApacheMimetypeHelper.php
@@ -128,6 +128,7 @@ public function getMimetypeFromExtension($extension)
             'yaml' => 'text/yaml',
             'yml' => 'text/yaml',
             'zip' => 'application/zip',
+            'msg' => 'application/vnd.ms-outlook',
         ];
 
         $extension = strtolower($extension);