Hi, does anybody know if asterisk can authenticate on a NOTIFY send to a peer. I use OpenSER as SIP-Proxy and asterisk as voicemail system with ODBC Support for voicemail-messages, voicemail-users and sip-peers/users. My SIP-Users register with OpenSER. Asterisk has two views on the OpenSER database for voicemail-users and sip-peers. Call-Routing, leaving voicemail-messages in database an MWI notification form asterisk through OpenSER to the SIP-Phones works well. No, I want that asterisk has to authenticate on a NOTIFY request send to OpenSER. He sends NOTIFYs to users which have messages in their boxes and OpenSER respond with a "407 Proxy Auth Required". But asterisk don't care about the 407 response. I want him to authenticate with his username/secret date. The register with this data on OpenSER works well. Can asterisk authenticate on a 407 response receiving on a send NOTIFY? Thx Reto