[Serusers] use of SIP_DOMAIN

hey ppl, i new to ser and i am struck at a point. I have 3 local machines and i have set them up as shown dialer -----> ser ---------> pstn gateway when i register to ser i use user at IPaddress:Port and then simply dial a pstn number in the script i am simply forwarding it to a pstn gateway .... Now my question is when SER forwards the request to the PSTN gateway it adds a new via header in which it uses IPaddress:Port whereas i want ser to use the domain that has been specified on the ser machine using export SIP_DOMAIN = "test domain" command First of all can i do that if yes please guide me how to do that ... and how do i make ser use example.domain ... is there any other way ??? I am using the hello world cfg file .... with no db / media proxy support. please correct me and help me thanks in advance Zeeshan --------------------------------- Everyone is raving about the all-new Yahoo! Mail beta.