new format of rexi_EXIT message

diff --git a/src/rexi_server.erl b/src/rexi_server.erl
index 10bc90d..8b92227 100644
--- a/src/rexi_server.erl
+++ b/src/rexi_server.erl
@@ -69,4 +69,4 @@
     lists:keyfind(Ref, 2, List).
 
 notify_caller({Caller, Ref}, Reason) ->
-    erlang:send(Caller, {rexi_EXIT, Ref, Reason}).
+    Caller ! {Ref, {rexi_EXIT, Reason}}.