# Table of contents:

• Introduction
• Command information
• Known changes
• Client-server communication example

# Introduction

MSNP3 is the second released version of the Mobile Status Notification Protocol.
It was introduced officially in Client Version 2.0.0085.

# Command information

It introduces the notification service commands:

• IMS

No switchboard or dispatch commands were known to be introduced in this version

No commands were known to be removed in this version

# Known changes

(from MSNP2):

• XFR: Added a new parameter that is always 0. No use is known or documented.
• Added Passport Site IDs to URL (parameter 3).
• Content types of both e-mail notifications have changed.
  • The initial configuration content type was changed from application/x-msmsgsemailnotification to text/x-msmsgsinitialemailnotification.
    The content remains the same.
  • The notifification content type was changed from application/x-msmsgsemailnotification to text/x-msmsgsemailnotification.
    The only difference in content is the added id header.
• Added Hotmail's Passport Site ID to new e-mail notifications.
• SND: Added a target language parameter and a client library parameter, similar to the one in CVR.
• Initial profile: Added Passport intergration fields.
• Font information has been added to Switchboard MSG commands.
• Non-protocol: Client can now use non-hotmail domains in relevant places.
• Non-protocol: WebTV 2.5+ clients (example@webtv.net) can talk to other users (example@hotmail.com)
• Clear-Text Password (CTP) authentication method removed. Use MD5 instead. Applies to both INF and USR.
• Official Client: Automatic login form now supports Passport authentication if parameter 3 is set in URL.
  To generate creds, MD5 hash the following as one concatenated string:
  • auth (from Initial Profile's MSPAuth, also included in the form) +
  • sl (amount of seconds since LoginTime, also included in the form) +
  • passwd (plain-text password).
• Official Client: Legacy automatic login form parameters has changed. This only applies for URL commands without parameter 3.
  To generate k2, MD5 hash the following as one concatenated string:
  • login (The local-part of your user handle, also included in the form) +
  • k1 (A short 2 digit number that you generate and is also included in the form) +
  • passwd (plain-text password).
• Official Client: Removed URL service PASSWORD.
• Official Client: Disabled inviting people to the service (needs confirmation).

# Client-server communication example

C: VER 1 MSNP3 MSNP2 CVR0
S: VER 1 MSNP3
C: INF 2
S: INF 2 MD5
C: USR 3 MD5 I example@hotmail.com
S: XFR 3 NS 10.0.0.5:1863 0

Client disconnects from server.

Client opens a connection to 10.0.0.5:1863.

C: VER 4 MSNP3 MSNP2 CVR0
S: VER 4 MSNP3
C: INF 5
S: INF 5 MD5
C: USR 6 MD5 I example@hotmail.com
S: USR 6 MDS S prefix
C: USR 7 MD5 S $md5(prefix + password)
S: USR 7 OK example@hotmail.com example%20user
S: MSG Hotmail Hotmail 367
MIME-Version: 1.0
Content-Type: text/x-msmsgsprofile; charset=UTF-8
LoginTime: 1726321960
EmailEnabled: 1
MemberIdHigh: 1
MemberIdLow: 2
lang_preference: 1033
PreferredEmail: example@hotmail.com
country: US
PostalCode: 
Gender: 
Kid: 0
Age: 
BDayPre: 
Birthday: 
Wallet: 
Flags: 1027
sid: 507
kv: 11
MSPAuth: AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA$$

C: SYN 8 5
S: SYN 8 5
C: CHG 9 NLN
S: CHG 9 NLN
C: IMS 10 OFF
S: IMS 10 0 OFF
C: IMS 11 ON
S: IMS 11 0 ON
C: SND 12 anotheruser@hotmail.com 0x0409 MSMSGS
S: SND 12 OK
C: OUT

Client disconnects from server.

S: OUT

Server disconnects client.