I've always had this question. Because when I tried to connect to MSN via dial up without using MSN explorer(the software to connect MSN), it always said that my ID or password is incorrect. I called MSN customer support before and the person said I MUST use MSN explorer to connect MSN. So, I gave up.
Now, when I put MSN/ in front of my ID, it worked. This is good. Because if I used MSN explorer, I had to use only this MSN ID in MSN Messenger. I couldn't use other e-mail account ID in MSN Messenger if I used MSN explorer.
Now I can switch between e-mail account ID's in MSN messenger.
Thank you gunder for answering this post!!!
Thank you blindkornkid8 for asking this question!!