Microsoft has just announced that it finally completed the email transition to Outlook.com, which means that the old yet extremely popular Hotmail has been officially retired.

The tech giant says that moving 300 million active accounts to Outlook.com was a real challenge, as the company had to preserve more than 150 million gigabytes of data, including emails, calendar, contacts, folders and personal preferences.

Users can still use their @Hotmail email addresses, but instead of the classic interface, they will be provided with the modern and fresh look of Outlook.com.

Microsoft has also debuted two new features for its email platform, including SMTP support and deeper SkyDrive integration to share files without leaving the inbox.

“Our belief is that as people start using the new experience, they will come to love it even more than they loved Hotmail. We are keenly listening to what our customers have to say, and we'll make the right set of adjustments to ensure that we make the experience as great as it can be,” Microsoft noted.