The iOS 16 mail app has received a number of new features and improvements. The update includes search enhancements - you can now issue searches within your inbox to find old messages. In addition, you're able to undo sending emails by tapping on that familiar blue "undo" button we've all come across before. Finally, if your inbox is overflowing with unread or unanswered emails, then this new feature will allow for reminders about these outstanding emails-complete with notifications of when they are due.