Hi Leona:
It's usually some format like:
mail.msn.com. The program USUALLY automatically selects POP3 for incoming and SMTP for outgoing. But you may have to do that yourself, i.e. POP3.mail.msn.com or SMTP.mail.earthlink.net Anyway, give it a try and see which one works.
Hope it helps.
Art Lady

I am brand new to this and used this prior thread to ask my question as it was along the same lines...when I travel from i.e. hotel to airport, etc. and the hosts change from hypothetically Cisco to MSN to Wayport, etc...how and where do I find their "outgoing server" so I can change my configuration and send outgoing e-mails?   I usually guess with STMP, mail., etc but isn't there somewhere I can easily look this up?   My incoming mail always remains the same, however i just don't know where to look for this outgoing server information per each host?  Thank you very much in advance for your replies.