Mail Categorization

Apple has also promised to improve the Mail app with on-device categorization to help organize your messages for you. This will work similarly to what Gmail and other webmail services have already been able to do for a while, except that it won’t rely on cloud-based algorithms — everything will happen on your iPhone.
For example, your most important emails will be sorted into a ”Primary” category while other things like receipts, newsletters, and marketing emails will get their own categories to keep them out of the way until you’re ready to deal with them.
This isn’t specifically an Apple Intelligence feature, so it should be available on all iPhone models supporting iOS 18. However, from the start, Apple said it would not be available until later this year. At this point, that’s probably iOS 18.2. Although Apple could surprise us and sneak it into a future iOS 18.1 beta, we’re guessing it has its hands full with Apple Intelligence right now.