Let's see. You have Internet connectivity through a Verizon mobile card,
and you have a Yahoo email address. Is that your only email address?
If your Yahoo account is one of the free US-based ones, it doesn't
have POP access, meaning Windows Mail can't communicate with it.
There are some workarounds, but they are not trivial to implement.
One solution would be to upgrade to a paid Yahoo account since that
will make Yahoo accessible with a POP email client like Windows Mail:
http://help.yahoo.com/l/us/yahoo/mail/original/mailplus/overview/overview-03.html
Another solution is a third party add-on:
http://ypopsemail.com/
However, we can't provide support for third party programs.
If you are not too attached to that Yahoo email address, you can get a
free Gmail account which will work with Windows Mail.