diff --git a/README.md b/README.md
index 61ad9c9..d4a7689 100644
--- a/README.md
+++ b/README.md
@@ -60,3 +60,7 @@ for authentication (like Thunderbird or Outlook). First you need to enable acces
 
 Also take into account that email `From:` header will contain the email address of the account being used to 
 authenticate against the Gmail SMTP server(SMTP_USERNAME), the one on the email will be ignored by Gmail.
+
+
+### Debugging
+If you need troubleshooting the container you can set the environment variable _DEBUG=yes_ for a more verbose output.