diff --git a/tutormail/server.py b/tutormail/server.py
index e73899f..ac875cb 100644
--- a/tutormail/server.py
+++ b/tutormail/server.py
@@ -83,6 +83,8 @@ def translate_recipient(self, rcptto):
         name, domain = rcptto.split('@')
         if name == 'alle':
             raise ForwardToAdmin('Mail til alle')
+        if name == 'wiki':
+            raise InvalidRecipient(name)
         groups = self.get_groups(name)
         if groups:
             emails = self.get_group_emails(name, groups)