Outlook does not control what mail programs are supported - the mail providers do, which is why I advised you to check with Juno.

If by that you meant that you found help pages at Juno's web site on
how to use Outlook, that only applies if you have a paid account.  I
don't use Juno and I found the help page on their free webmail access
pretty easy to find and why I asked if you had bothered to look at
*Juno's* help or if you meant you were digging around inside of
Outlook's help.  To get to their web pages that describe setup within
Outlook, I went to www.juno.com, clicked on Help, clicked on a version
(I assumed you would be using version 6 access, the middle button),
and then clicked on E-mail.  It seems damn obvious right at the top of
the page where it says, "To take advantage of offline email clients
such as Microsoft Outlook, you must upgrade to a Platinum or Turbo
account."  When I click on "Setting Up My E-mail Manually", again I
see that same banner at the top telling you need to PAY to get access
to their mail servers.  When I click on Outlook 2002 setup
instructions, there's that banner again.  Just how could you miss it?
That's why I still suspect that you really didn't look that very hard
at their help pages or ignored the provided information and went to
what you wanted rather than what they provide.  Your mindset was that
you were somehow *due* the access to their POP/SMTP mail servers so
that's the direction you took when wading through their help pages;
i.e., you saw what you expected to see.  POP and SMTP servers cost
money to manage and why they want to charge for them.  The wrong
assumption apparently made you blind to all those banners.

It's typical to provide the free webmail service as a marketing ploy
to get some of those same users to later "upgrade" (i.e., buy) their
way to the more desirable resources.  Also, anytime you use a "free"
resource, you have no recourse should they decide to change their
services, like yanking away mail servers and switching to webmail, or
changing the webmail UI, or taking the service down anytime they
please without notice for any length of time they please, or just
completely cease operations.  It's free.  You aren't due anything.

If Juno yanked away their POP and SMTP servers and that is what you
were using before, it's a good bet that they sent notification e-mails
to your account to notify you of the change.  It's been over 2 years
since the switch so it is likely you were trying to setup a *new*
account at Juno but for some reason thought you were due resources for
a free account.  Their setup pages have the notification banners
telling you that a paid account is required.  Hard to miss.