What about my emails made in the Classic Editor?
Unfortunately emails and templates from the old Classic Editor are incompatible with the new Drag and Drop editor. This is due to many of the functions, features, and code of the new editor, were not available in the old editor. But with the new Drag and Drop editor, all email templates or emails created by you will be mobile friendly, and it's been said that it's easier to use!
General Questions April 6, 2022