Msn is extension of Messenger live. You can open this format with Msn Live.
Microsoft MSN is a messaging software that is already installed with Windows operating system.
Warning: If you get a message says "click, if you want to see the people who blocked you" in recent times. You must avoid opening those sites.
If you enter your password on those kind of sites it automatically sends messages to your contacts list without your information.
Passport is a Microsoft product and you can only change your password with it.
You should follow 3 steps:
Passport > account services > change the password
What to use msn
which page related to msn file
msn Related Searches
You can check related links about msn fileextension.