Hello; i think i found problem. it is textops module.Appending new header doesnt increase content length. in addition , remove_hf doesnt work correctly that doesnt remove headers. -- View this message in context: http://sip-router.1086192.n5.nabble.com/truncating-sip-message-tp147332p147337.html Sent from the Users mailing list archive at Nabble.com.