--- exim.conf	Thu Jul 19 18:24:41 2001
+++ exim.conf-whoson	Thu Jul 19 18:26:15 2001
@@ -106,7 +106,8 @@
 # calling its own SMTP port, is locked out by default. If you want to permit
 # relaying from the local host, you should set
 #
+# host_accept_relay = localhost : net-whoson;$key
 host_accept_relay = localhost
 #
 # If you want to permit relaying through your host from certain hosts or IP
 # networks, you need to set the option appropriately, for example