![]() ![]() However, it was not a big overhaul, the only obvious change was integration with Hotmail address books.Įmployed by Windows Live Messenger 8.0, MSNP13 features a lot of changes. MSNP9 was introduced with MSN Messenger 6, adding support for "D type" (data) messages, which are used for transferring display pictures and custom emoticons between clients, frame-by-frame web cam (rather than a traditional stream like Windows Media Player's WMV format) and an improved voice system, as well as improved NAT traversal for file transfers.Įmployed in MSN Messenger 6.1, after Microsoft started blocking earlier versions in October 2003. This version of the protocol supports Windows Messenger-to-Windows Messenger webcam and voice capabilities. MSNP8 was also supported by the Messenger clients in later versions of MSN TV starting at 2.8.1, as well as its successor, the MSN TV 2, and was the last version of MSNP to be supported by MSN TV. Version 5.0 of MSN Messenger and Windows Messenger versions 4.7 through 5.1 are the only known desktop clients that use MSNP8. As such, old and obsolete clients are unable to sign in, forcing users to upgrade clients. NET Messenger Service after Microsoft blocked earlier versions for security reasons. It was the minimum version of the protocol accepted by. MSNP8 introduced a different authentication method, now sending authorization to the secure Microsoft Passport servers and returning a challenge string. MSNP6 was used by later versions of MSN Messenger 4.x. MSNP3, 4, and 5 were supported by the Messenger servers by July 2000 and used by MSN Messenger 3.0 and 4.0. ![]() ![]() MSNP3 was also supported by the first version of the WebTV ( MSN TV) Messenger client released in its Summer 2000 upgrade, and introduces a new command specifically for use by those clients - IMS - which allows the ability for a client to allow or block new switchboard sessions (chats) with other users at any point while the user is signed in. However, the production version differed from the published version in a few subtle ways.īoth MSNP2 and MSNP3 were supported by MSN Messenger 2.0. It is believed it was used during the early stages of design and development with MSN Messenger 1 MSNP2 Ī pre-release version was made available to developers in 1999 in an Internet Draft. Starting on September 11, 2007, Microsoft forces most current users of MSN Messenger to upgrade to Windows Live Messenger 8.1 due to security considerations. During October 2003, Microsoft started blocking access to Messenger service using versions below MSNP8. MSNP was first used in a publicly available product with the first release of MSN Messenger in 1999.Īny major change made to the protocol, such as a new command or syntax changes, results in a version-number incremented by one in the format of MSNP #. Third-party clients such as Pidgin and Trillian can also communicate using the protocol. Microsoft Notification Protocol ( MSNP, also known as the Mobile Status Notification Protocol) is an instant messaging protocol developed by Microsoft for use by the Microsoft Messenger service and the instant messaging clients that connect to it, such as Skype since 2014, and the earlier Windows Live Messenger, MSN Messenger, Windows Messenger, and Microsoft Messenger for Mac. For the service itself, see Microsoft Messenger service. This article is about the technical details of Microsoft's IM protocol. ![]()
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