Thank you for providing feedback on the new Outlook on the web experience. I am a Support Engineer with Microsoft and apologize for any inconvenience you may have been through.
We understand your concern, however, I would like to inform you that this is our new Outlook automatic upgrade for all Outlook.com users and the ability to go back to the previous format is not available. The Engineering team is working on the continuous improvements for the new Outlook service.
As per your concern please check the screen shot attached and check those boxes , you can add the address in safe sender as well .
1. Click on "Cog" icon.
2. Click on “Options” and select “Junk email” under “Mail”.
3. Select “Safe senders” option.
4. Now, add the address
Also, if you need help to learn about the new features, here is a URL to a self-help FAQ article with links to more information: https://support.office.com/article/40676ad0-c831-45ac-a023-5be633be798d.