Send mail on update?

May be if you change the publish date for later !

Thanks you for the answer.
So i switch to draft and then publish to later ?

As you want, if you switch to draft, your post is no longer present for users, so you can modify it and publish at a later time.

If you want you post to stay on line, you have to modify without saving (you can visualize your changes), and when finished publish at later time.

It’s working !!
Thank you so much

??