Hi All, I am trying to communicate between two sip servers.The communication from external sip server user to kamailio user works but message from kamailio to external sip user is not reaching. I get the following error in Jitsi "The above message could not be delivered A network problem occurred. Please check your network configuration and try again. Error was: 408 Request Timeout" Does kamailio do SRV lookup ? How do i force kamailio to use DNS SRV lookup. Any clues ??