We've all had that moment.

You hit send on an email and your stomach drops.

Maybe it was a typo in the subject line. Maybe you spotted a tone that came across sharper than you meant. Maybe and this one's a classic you hit "reply all" when you absolutely, definitely did not mean to.

In that split second, you'd give anything to pull the message back.

Here's the good news: in the new Outlook, you can. Well, almost. You can give yourself a small but mighty buffer, a handful of seconds to catch the mistake before it lands in someone's inbox.

It's called Undo Send, and once you've set it up, you'll wonder how you ever worked without it.

Why we need this more than ever

Let's be honest. We're all working faster.

Inboxes are fuller. Meetings are tighter. Notifications are constant. And now, with tools like Microsoft Copilot helping us draft emails in seconds, the speed at which we communicate has gone up another notch.

That's a brilliant thing until it isn't.

Because speed without a pause can lead to:

• Sending before properly reviewing
• A tone that doesn't quite reflect what you meant
• Missing a key attachment or detail
• Accidentally including (or excluding) the wrong person
• Replying when you really should have taken a breath

The faster we work, the more important it becomes to build in tiny moments of friction, small pauses that protect us from ourselves.

Undo Send is exactly that. A built-in pause. A safety net. A "wait, let me just check" moment, hardwired into your email.

What is Undo Send, really?

Undo Send is a setting in Outlook that delays your email from being sent for a short window of time of up to 10 seconds in new Outlook and Outlook on the web.

During that window, you'll see a small notification at the bottom of the screen with an option to Undo.

Click it, and your email goes straight back to your drafts, exactly as you left it. No one sees it. No awkward follow-up. No "please ignore my last email" message.

It's not magic. It's not AI. It's just a thoughtful little feature that gives you space to breathe and to think.

How to set up Undo Send in new Outlook

The whole thing takes about 30 seconds to enable. Here's how:

1. Open new Outlook
2. Click the Settings icon in the top right
3. Select Mail
4. Go to Compose and reply
5. Scroll down to Undo send
6. Use the slider to choose your delay (up to 10 seconds)
7. Click Save

That's it. You're done.

From now on, every email you send will have that little buffer baked in. You'll see an "Undo" prompt appear at the bottom of your screen and you'll have a few precious seconds to make the call.

Tip: Set the slider to the maximum (10 seconds). The extra few seconds rarely matter to the recipient, but they can make all the difference to you.

"But 10 seconds isn't very long…"

True. It's not the full minute many people would love.

But here's the thing, 10 seconds is often all you need.

Most "oh no" moments happen the instant you hit send. Your brain catches the mistake almost immediately. The typo jumps out. The tone suddenly feels off. You realise you forgot the attachment.

That's the window Undo Send is designed for.

It's not about giving you time to rewrite the whole email, it's about giving you time to stop it before it goes.

And honestly? That tiny safety net builds something even more valuable: confidence.

The hidden benefit: a more thoughtful you

Here's something I've noticed working with teams adopting new ways of working.

When people know they have a small buffer, they don't get reckless — they actually get more intentional.

That short delay creates a moment of mindfulness. A pause to ask:

• Have I said this the way I meant to?
• Is my tone warm enough?
• Have I addressed the actual question?
• Am I sending this to the right people?

In a world where we're firing off emails between meetings, that micro-pause is a quiet act of care for yourself, your colleagues, and your clients.

How this fits with Copilot

If you're using Microsoft Copilot to help draft emails (and if you're not, you might want to give it a go), Undo Send becomes even more important.

Copilot is brilliant at producing a polished draft in seconds. But it doesn't know:

• The history you have with the recipient
• The political dynamics of your team
• The tone you'd usually use with that particular client
• The bit you forgot to mention

That's still your job. Copilot is the assistant; you're the human in charge.

Undo Send gives you that vital review window. A few seconds to read what Copilot wrote, check it sounds like you, and make sure it lands the way you want.

It's a small habit, but it's the kind of thing that turns AI from a shortcut into a true partner.

A simple challenge for you this week

Here's what I'd love you to try:

1. Turn on Undo Send today. Set it to the full 10 seconds.

2. Send yourself a test email. Notice the prompt at the bottom of the screen and how it feels to have that option.

3. Pay attention to how it changes your behaviour. Do you find yourself pausing more? Catching small things? Feeling calmer when you hit send?

The bigger picture.

We talk a lot at 365 Training Hub about how the way we work is changing. AI is helping us draft faster. Teams is helping us collaborate from anywhere. Copilot is reshaping what's possible in Microsoft 365. None of this replaces the basics, like making sure the email you send actually says what you meant.

The best digital habits aren't always the flashiest. Sometimes they're the smallest. A keyboard shortcut. A saved search. A tidy folder system. A 10-second delay on your outbox. Each one is a little gift to your future self.

Go and turn on Undo Send.

It takes 30 seconds. It costs nothing. And the next time your stomach drops after hitting send, you'll thank yourself. Sometimes the smallest tweaks really do make the biggest difference to how we work and how we feel about how we work.

At 365 Training Hub We help New Zealand organisations get the most out of Microsoft 365 and Copilot through practical, people-first training that turns new tools into new habits.

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