Where's here?

In Windows Mail, if you want to connect to yahoo.com, you have to
either pay extra or install a proxy program.

http://help.yahoo.com/l/us/yahoo/mail/original/mailplus/pop/pop-35.html

http://help.yahoo.com/l/us/yahoo/mail/original/mailplus/pop/pop-08.html

http://help.yahoo.com/l/us/yahoo/mail/original/manage/sendfrom-07.html

http://help.yahoo.com/l/us/yahoo/mail/original/mailplus/pop/pop-14.html

http://ypopsemail.com/

http://www.freepops.org/en/

Some of the yahoo.com instructions were written for Outlook Express,
but should also work for Windows Mail.  Yahoo also has some mail
servers for other countries or for specific internet providers; these
often have different restrictions.

For AOL, see here:

http://email.about.com/od/windowsmailtips/qt/et_access_aol.htm

http://members.aol.com/adamkb/aol/mailfaq/imap/

Windows Mail allows you to set up more than one email account
for the same Vista user, but puts the incoming mail for all of them
in the same Inbox.