Called when a MSG command has been received.
Indicates that the notification server has send us a MSG. This is usually a MSG from the 'HOTMAIL' user (account is also 'HOTMAIL') which includes notifications about the contact list owner's profile, new mail, number of unread mails in the inbox, etc.
MSG [Account] [Name] [Length]
NSMessageHandler Class | XihSolutions.DotMSN Namespace