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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:

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

It introduces the error codes:

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).
Removed PASSWORD service from URL.
Added Hotmail's Passport Site ID to new e-mail notifications.
Initial profile: Added Passport intergration fields.
Font information has been added to Switchboard MSGs.
Multiple error-codes unimplemented in 1.x that were in the draft are now implemented in the Official Client. Examples include: 208, 215, 501, 604 (bizzarely enough), 715 and finally 913.
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)
More URL requests implemented (assumed)
Clear-Text Password (CTP) authentication method discontinued.
Entire content of initial email notification changed from text/x-msmsgsemailnotification to application/x-msmsgsinitialemailnotification, the format is likely different. Now includes unread email count. [Examination needed]
Official Client: Automatic login form now supports Passport 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.

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: OUT