Google has just announced that you can log in to Gmail without the need of an @Gmail email address. With this, they mean that you can log in to the service using your current email addresses like Hotmail, Yahoomail or Outlook.
So starting today, if you use Yahoo! Mail or Hotmail/Outlook.com, you now have the option to Gmailify your inbox.
All you need to do is open the Gmail app, sign in to your email account(s), and enable Gmailify. And of course, you’re always in control—so if you ever change your mind, you can unlink your account(s) at any time, and continue to access them through the Gmail app without using Gmailify.