diff --git a/conf/sender.cfg b/conf/sender.cfg
index e5db6b4a..731699d8 100644
--- a/conf/sender.cfg
+++ b/conf/sender.cfg
@@ -3,10 +3,11 @@
 protocol: AMS
 
 [broker]
-# 'host' and 'port' must be set manually as LDAP broker search is now removed.
-# 'port' is not used with AMS.
-host: msg-devel.argo.grnet.gr
-# port: 443
+# msg-devel.argo.grnet.gr is only for test data
+# msg.argo.grnet.gr is for production data
+host:
+# 'port' is only used for STOMP sending.
+port: 443
 
 # broker authentication.  If use_ssl is set, the certificates configured
 # in the mandatory [certificates] section will be used.