Requiring use of the mobile app to add a mailbox is asinine. Please fix this glaring oversight. I don't use your app, even while on mobile, ever under any circumstance. You have a website where I go to view emails. I don't use any unnecessary apps on a secured mobile device. I'm this close to just self hosting my own email server because the Yahoo Mail services continue to enshitify in various ways such as those we're specifically asked not to mention while posting these ideas or else the post will be deleted.

Make your website work or lose your customers. I don't care which. I have zero loyalty to you.