Twilio Uses Inbox Monster to Dig Into Apple Intelligence

Written by
Inbox Monster

March 18, 2025

Apple Intelligence is changing the inbox experience, rewriting preheaders, summarizing emails, and sometimes even skipping over key details. So, what happens when you put it to the test?

We partnered with Twilio to find out.

Through a series of structured tests, we explored how Apple Intelligence interprets different email designs, coding structures, and content. The results? Some expected, some surprising, and some reinforcing a major shift in how brands should think about email engagement.

Our key takeaways:

  • Live text is now more crucial than ever
  • AI-generated summaries can distort messaging (or skip important details)
  • Subject lines need to stand on their own—no more relying on preheaders to complete the story

Want to find out how your emails might be rewritten by Apple before they even land in the inbox? Twilio’s latest blog has the full breakdown.

📖 Read the full breakdown here

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