Microsoft is working on a feature that could finally stop the all-too-common habit of spotting a typo the instant you hit Send.
According to an Admin Center update spotted by Windows Latest, New Outlook spell check is getting an automatic check-before-send option. Here is what changed, when it arrives, and what it means for the email tools you use every day.
#1 New Outlook spell check before Send
Outlook already flags spelling and grammar mistakes as you type, powered by Microsoft Editor, the company’s business-focused take on tools like Grammarly. But that only helps if you notice the red squiggle before you hit Send.
The new feature steps in at the last moment. Instead of just highlighting errors while you compose, it will remind you to correct typos before the message actually leaves your outbox.
Microsoft confirmed the change in Admin Center message MC1479509. According to the update, automatic spell check before sending starts arriving in October 2026, though it won’t be widely available until at least mid-December 2026.
In Microsoft’s own words, the goal is simple: “If you don’t want to check spelling manually for every message—or you’re worried you might forget!—you can set Outlook to check spelling for you every time before sending emails.”
Importantly, Microsoft says it won’t force this on. The company recognizes that automatic spell check can get annoying, especially since Microsoft Editor sometimes flags words that aren’t actually wrong. Type “colour” in British English and it may still try to correct it to “color” if your writing style is set to American English.
So you’ll toggle the feature on yourself. Starting in October 2026, you can find the setting in New Outlook’s Settings menu. Until you turn it on, nothing changes.
What this means for you: if you’ve ever sent a message with a glaring typo because you were rushing, this is a low-risk safety net. It’s opt-in, so you control whether it ever interrupts your workflow.
#2 Outlook Classic gets an “Explain this” Copilot feature
Outlook Classic won’t get the automatic spell check feature. As Microsoft has made clear, the legacy version is reserved for security fixes and improvements—unless the change involves Copilot.
And Copilot keeps coming. In a separate Admin Center update (MC1311978), Windows Latest spotted a new “User Initiated Insights” capability being added to Copilot in Outlook Classic.
This lets you trigger Copilot only when you want it. Select some text in an email, choose “Explain this,” and Copilot reads the selected content—along with the context of the message and previous emails—to give you a summary or clarification in its sidebar.
Microsoft describes the change as giving users “greater control over when and how Copilot assists them, improving productivity, clarity, and decision-making directly within their workflow.”
The company began testing the feature in May 2026, and it’s now set to roll out to everyone in October 2026.
What this means for you: if you’re still on Outlook Classic and want Copilot help without it popping up unprompted, this is a more restrained approach. You decide when to ask for insights rather than reacting to a sidebar that appears on its own.
#3 New Outlook gets a Classic-like theme
Microsoft also wants to make the jump from Outlook Classic to New Outlook feel less jarring. According to a separate report, New Outlook is getting a theme that mimics the look and feel of the older Win32 version.
The idea is to ease the transition for people who resist switching. But there’s a limit to how much a new theme can solve.
Many users stay on Outlook Classic for reasons beyond appearance. New Outlook still lacks some advanced features that matter to their daily workflows, and a cosmetic refresh doesn’t close that gap.
What this means for you: if you’re weighing the switch, the Classic-like theme might make New Outlook feel more familiar. But if you depend on advanced features that are still missing, look for those before committing to the move.
What this means for you
Taken together, these updates show Microsoft splitting its Outlook strategy: New Outlook is where the productivity features land, while Outlook Classic gets just enough Copilot to keep holdouts comfortable.
The spell check feature is the most immediately useful for everyday users. It’s opt-in, arrives in stages through late 2026, and targets a mistake almost everyone has made at least once.
How to get it
For the automatic spell check, open New Outlook, go to Settings, and look for the spell check-before-send toggle once it becomes available in October 2026. It’s off by default, so you’ll need to turn it on.
The “Explain this” Copilot feature and the Classic-like theme will arrive automatically as part of their respective rollouts. No action is required beyond having the latest version installed.
Source: Windows Latest
Over to you: Will you enable the automatic spell check before Send, or do you trust your own proofreading?
