diff --git a/rhodecode/lib/rcmail/exceptions.py b/rhodecode/lib/rcmail/exceptions.py
--- a/rhodecode/lib/rcmail/exceptions.py
+++ b/rhodecode/lib/rcmail/exceptions.py
@@ -5,7 +5,7 @@ class InvalidMessage(RuntimeError):
     as recipients or sender address.
     """
 
-class BadHeaders(RuntimeError): 
+class BadHeaders(RuntimeError):
     """
     Raised if message contains newlines in headers.
     """