[SR-Users] append_hf to reply generated by kamailio

Hello, Is it possible to append a new header to a reply generated by Kamailio and also have it present when duplicating the message to a capture server? At the moment the 603 Reply is duplicated to my capture server, but I don't know how to append a new header, because the kamailio script stops executing after exit is called. Is there a reply_route which is executed for all replies, including the ones generated by kamailio itself? For instance inside this code block: request_route { ..... if($var(routing_query_result) =~ "DESTINATION_NOT_ALLOWED") { xlog("L_INFO", "[R-CORE-INCOMING-INVITE:$ci] !>" "Rejecting the call, because the destination is not allowed\r\n"); sl_send_reply("603", "Decline"); exit; } ..... }