[Freeswitch-users] dialing a alphanumeric user

Hello, I am trying to call an alphanumeric user, for example john@domain.com and it doesn't work. I get a [NO_ROUTE_DESTINATION] error message. It only works if I add the number-alias option and dial the numeric extension. My user extension config (without number-alias) as follows: <include> <user id="john"> <params> <param name="password" value="1234"/> <param name="vm-password" value="1234"/> </params> <variables> <variable name="toll_allow" value=""/> <variable name="accountcode" value="john"/> <variable name="user_context" value="default"/> <variable name="effective_caller_id_name" value="John Doe"/> </variables> </user> </include> What am I doing wrong? Thanks