Using the link
graalonline.mail.everyone.net has a few flaws. I have been using it for two days now, but there a 3 versions you can use. One version is free, (the one I have), the other two cost money, but I forget how much. The free version has some simple perks, but the paid version are pretty loaded. Anyway, the thing that isn't good is you have to delete the SENT mail to gain space in your email. This is very annoying, but when someone replies to you, you have the full conversation there anyway.
The email service I think is pretty cool, but very complicated, and should only be used for the ones who will actually put time into learning it.