Apple released iOS 27 on 14 September. Al Iverson asked the right questions beforehand: rendering, BIMI logo support, and the bugs that tend to turn up in a .0 release. Four days on there is no public report of a change to any of the three. That is an absence of evidence rather than evidence of absence, so run your templates through a device test this week regardless.
What did change is how people find and act on mail they already have.
Search ranks by relevance. Apple describes a new ranking system that brings the most relevant results to the top, however deep in the inbox they sit. MacRumors’ example is a search for a retailer’s name surfacing the recent order ahead of that retailer’s marketing. Transactional mail wins the search. Promotional mail used to win on recency and now competes on relevance. This is the change that matters most, because it is the only one with no conditions attached: every iPhone running iOS 27 gets it, no Apple Intelligence hardware required, no regional gate.
Siri can bulk-delete a sender. 9to5Mac notes that users can ask Siri to delete every message from a given address. That is a third exit alongside unsubscribe and report-as-junk, and as far as anyone can tell it sends no signal back. A subscriber who does this stays on the list, never complains, and never opens again. Your engagement metrics will show a corpse.
Mail reads the message for you. Suggested actions at the top of a message now extend to third-party apps, alongside the existing Calendar, Maps and Wallet options. A long press offers an Ask Siri summary. Call Context surfaces an order or booking reference in the Phone app when the user rings the business. All of it depends on Mail parsing the content. Order numbers, tracking references, dates and reservation codes belong in live text. Apple does use OCR to read text inside images, but keeping critical data in HTML ensures it is parsed instantly and reliably.
Most of the world gets the search and nothing else. Siri AI is unavailable in the EU and China at launch, which removes the bulk delete and the Ask Siri summary for a large share of the addressable audience. Contextual Suggestions are English-only at launch. All of the AI features need an Apple Intelligence-capable iPhone. EU senders should plan for the search effect now and the rest whenever Apple and the Commission finish their conversation.
Unchanged. Mail Privacy Protection, inbox categories and summaries all carry over. Movable Ink observed in July that the expected Gmail-style AI inbox did not arrive. It still has not.
Better search has one further consequence worth planning for. Old promotional emails will now be found and opened weeks after sending. An expired offer with a dead link is a likelier experience than it was a fortnight ago. If your landing pages 404 after the campaign ends, that is now a customer-facing problem rather than a housekeeping one.
