diff --git a/rhodecode/lib/rcmail/exceptions.py b/rhodecode/lib/rcmail/exceptions.py
new file mode 100644
--- /dev/null
+++ b/rhodecode/lib/rcmail/exceptions.py
@@ -0,0 +1,11 @@
+
+class InvalidMessage(RuntimeError):
+    """
+    Raised if message is missing vital headers, such
+    as recipients or sender address.
+    """
+
+class BadHeaders(RuntimeError): 
+    """
+    Raised if message contains newlines in headers.
+    """