diff --git a/symfony/swiftmailer-bundle/2.5/manifest.json b/symfony/swiftmailer-bundle/2.5/manifest.json
index 231619fa..ce3837cd 100644
--- a/symfony/swiftmailer-bundle/2.5/manifest.json
+++ b/symfony/swiftmailer-bundle/2.5/manifest.json
@@ -6,7 +6,8 @@
         "etc/": "%ETC_DIR%/"
     },
     "env": {
-        "#1": "For Gmail as a transport, use: \"gmail://username:password\"",
+        "#1": "For Gmail as a transport, use: \"gmail://username:password@localhost\"",
+        "#2": "To disable sending emails, use: \"null://localhost\"",
         "MAILER_URL": "smtp://localhost:25&encryption=&auth_mode="
     },
     "aliases": ["mailer", "mail"]