When I upload my photos to Adobe Stock I receive a notification in the mail: the File is accepted. How do I disable these notifications?
Congratulations! If you get that mail, you are sure that your asset is in the pool to be sold. I would not disable that mail, because it bears useful information.
Definitely not spam. Perhaps you can set filters in your email app to automatically file it.
If you don't want to have emails sent then you can go to your contributor account and uncheck do you want email notifications.