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iOS 15.4 Has a Cool Hidden Mail Feature That Helps Clean Up Your Folder Mess

Email app interface showing folders such as Inbox, Important, and Trash.

Apple's iOS 15.4 and iPadOS 15.4 updates have a pleasant surprise for iCloud Mail users and everybody that use the Mail app as their primary email client for AOL, Gmail, Outlook, Yahoo, and other third-party email services.

When you're in the primary Mailboxes view in the Apple Mail app on your iPhone or iPad, you can scroll down past the first section that houses your inboxes and any filters you've added to see each email account in more depth.

Tapping an account will expand the directories, giving you quick access to drafts, sent mail, junk, trash, archives, and all of your custom folders and labels. However, it literally expands everything, making it a chore to scroll to the directory you actually need.

Pre-15.4, if you had folders with subfolders, those subdirectories would appear whether you wanted them to or not. The gray expand arrow next to the parent directory was useless, so tapping it would not collapse the child folders.

In iOS 15.4 and iPadOS 15.4, released on March 14, 2022, you can now collapse each folder tree you see. It will remember your preference, so you won't have to worry about them auto-expanding the next time you go check. It's something that Apple should have added years ago, but it's better late than never.

Screenshot of an email interface showing a list of folders with highlighted options for "All Mail" and "Auto Transcend."
Screenshot of an email interface showing a list of folders with highlighted options for "All Mail" and "Auto Transcend."

It would be nice if Apple included an actual setting in Mail's preferences to auto-collapse or auto-expand everything in an email account's hierarchical directory structure, but the new collapse and expand buttons are the next best thing.

Cover photo, screenshot, and GIF by Justin Meyers/Gadget Hacks

Apple's iOS 26 and iPadOS 26 updates are packed with new features, and you can try them before almost everyone else. First, check our list of supported iPhone and iPad models, then follow our step-by-step guide to install the iOS/iPadOS 26 beta — no paid developer account required.

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