New Outlook adds automatic spell check before you hit Send
Microsoft is adding automatic spell check to New Outlook that warns about typos right before an email is sent. The feature arrives in October 2026 and reaches broad availability by mid-December 2026; it is opt-in and won't come to Outlook Classic.
- Warns about typos before the email is sent
- Opt-in toggle in Settings starting October 2026
- Broad rollout no earlier than mid-December 2026
- Outlook Classic only gets Copilot's User Initiated Insights
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