How to get non-Hotmail/MSN emails to work with MSN Messenger?

[Jeremy]

I notice that some of my MSN Messenger contacts are able to use MSN Messenger with their non-Hotmail and non-MSN email addresses. Will MSN Messenger still be able to tell them when they receive a new email message? How is this done?

[Paragon]

Hi Jeremy:wave:

I believe that the ability to notify the user that they have a new email message is confined solely to MSN related email addresses. However, you can use MSN messenger with any email address.