diff -r fae3fdfece65 -r f8640c663e3e iro/error.py
--- a/iro/error.py	Mon Feb 06 14:39:33 2012 +0100
+++ b/iro/error.py	Tue Feb 07 01:56:59 2012 +0100
@@ -51,3 +51,10 @@
         self.number = number
         msg = "No valid email: '%s'"%(number)
         ValidateException.__init__(self, 702, field, msg)
+
+
+class NoRoute(Exception):
+    pass
+
+class RejectRecipient(Exception):
+    pass