Juno email is available to both paying and non-paying Juno users—but there are differences!
One of the caveats of using Juno Webmail while being a Juno Free user, for example, is that, unless you upgrade your membership, you can't use your Juno email account through an email client like Outlook, Eudora, or Thunderbird. You can only use the web interface.
But, don't fret.
You can always connect to the internet through Juno's free service and use a service other than Juno Webmail to send, receive, and manage your email. Simply because you use Juno as an ISP does not mean you have to use their webmail system.
The internet offers many alternative free webmail solutions!
Is Juno Email Free?