Hi all, I use SIPSAK to send a SUBSCRIBE to SER server: sipsak -s sip:prueba at 10.22.1.249 -vvv -l 5061 -H 10.22.1.16 -f subscribe.txt Then, I receive a 200Ok and NOTIFY from the server. After that, I should send a "200 OK" to server but I don´t know how do it with SIPSAK. Could someone help me? Thank you very much. Ben.