diff --git a/apps/kolab_guam/src/kolab_guam_session.erl b/apps/kolab_guam/src/kolab_guam_session.erl
--- a/apps/kolab_guam/src/kolab_guam_session.erl
+++ b/apps/kolab_guam/src/kolab_guam_session.erl
@@ -261,7 +261,7 @@
     apply_next_rule_serverside(ImapSession, ModifiedData, [{ Module, ModifiedRuleState } | ActiveRulesAcc], ActiveRules).
 
 apply_ruleset_clientside(_ImapSession, _Socket, ClientData, _CurrentCommandSplit, [], []) ->
-    { ClientData, [], [], perform_passthrough, undefined };
+    { ClientData, [], [], [], [], perform_passthrough };
 apply_ruleset_clientside(ImapSession, Socket, ClientData, CurrentCommandSplit, UndecidedRules, CurrentlyActiveRules) ->
     { PostAction, SplitCommand, SplitResetTrigger } =
         case CurrentCommandSplit of