How to Unsend an Email in 2026: Gmail, Outlook, iPhone and Mac

You can only unsend an email in the few seconds after you hit Send. Click Undo in Gmail, tap Undo Send in Apple Mail, or use Undo send in Outlook if you've switched it on. Once that window closes, the only real way to pull a message back is Outlook's Recall, and it only works with Microsoft 365 work or school accounts.

I know that half-second after you hit Send, when your brain finally catches up with your fingers. The good news is that most of the fixes take one click, as long as you know where to look. I'll walk you through Gmail, iPhone, Mac and Outlook, then what I'd actually do if it's too late.

Unsend an email: the quick answer for each app

Here's the part most people miss: “undo” doesn't reach into anyone's inbox. Your app simply holds the email for a few seconds before it actually sends. Click Undo in time and the email never left, so the other person never sees a thing.

How to unsend an email in Gmail

On a computer:

1. Right after you click Send, look at the bottom-left corner for a small “Message sent” notice.
2. Click Undo.
3. The email reopens as a draft. Fix it, then send it again.

On Android, the Gmail app shows “Sent” with an Undo button right after you send. Tap it. Google's help page has the steps for each device.

Get 30 seconds to unsend in Gmail (instead of 5)

If you change one setting after reading this, make it this one. Gmail lets the Undo button stay for 5, 10, 20 or 30 seconds:

1. Open Gmail on a computer and click the Settings gear.
2. Choose See all settings.
3. Next to Undo Send, pick 30 seconds.
4. Scroll down and click Save changes.

I'd go straight to 30. Your emails leave half a minute later, which nobody on the other end will ever notice, and you get time to spot the mistake you only see once the email is gone. (For some reason that's usually the subject line.) It only helps with future emails, though, not one you've already sent.

Here's what those extra seconds buy you. Picture Greg, an account manager at a Chicago ad agency, sending a client in Milwaukee the Q1 media plan at 4:50 p.m. on a Friday. The budget line says $48,000. It should say $84,000. On the 5-second default, the email is gone before his eyes reach the second paragraph. On 30, he sees it at second 12, clicks Undo, fixes one number and sends it again. The client never knows there was a first version.

The one Gmail email you can take back later

There's a feature most people never touch: confidential mode. If you send an email with it switched on, you can open it from Sent later and click Remove access, and the recipient can no longer open it. That works any time before the expiry date you set.

Two catches. You have to turn it on before you send, and Google itself says recipients can still take screenshots or photos. I wouldn't use it for everyday mail, but say you're emailing bank details or a contract that might change: that's when it earns its place.

How to unsend an email on iPhone and Mac (Apple Mail)

Apple Mail gives you 10 seconds. On iPhone, tap Undo Send right after sending and the email comes back to you. On a Mac, click Undo Send, or choose Edit → Undo.

Ten seconds goes fast, so I'd lengthen it:

• On iPhone: go to Settings → Apps → Mail → Undo Send Delay and pick a longer delay. Apple covers it in the iPhone User Guide.
• On a Mac: open Mail → Settings → Composing and change Undo send delay. You can turn the feature off there too (Apple's Composing settings).

Ten seconds is especially short on a phone. Say Megan, who runs a small design studio in Denver, sends an invoice from her iPhone between client meetings and notices the attachment is last month's. By the time she's checked the attachment, ten seconds can easily be gone. On a phone you're always doing two things at once, so I'd pick the longest delay on offer.

How to recall an email in Outlook

Outlook has two different features, and which one you get depends on your account. This trips up a lot of people, so check which one you have first.

Personal Outlook accounts: turn on Undo send

Outlook.com, Hotmail, Live and MSN addresses can't recall a delivered message. What you can do is turn on Undo send: go to Settings → Mail → Compose, choose a delay under Undo send, and save. Microsoft says you can delay sending by up to 30 seconds. After you send, an Undo prompt shows at the bottom of your message list for that long.

Work and school accounts: Recall

If you and the recipient both use Microsoft 365 work or school accounts in the same organization, you can try to pull a message back after it's been delivered:

1. Open Sent Items and double-click the email so it opens in its own window. Recall won't show in the reading pane.
2. In new Outlook or Outlook on the web, select Recall Message and confirm. In classic Outlook, find Recall This Message (under More Move Actions or Actions, depending on your ribbon), then choose whether to delete the unread copies or replace them with a new message.
3. Watch your inbox for the Message Recall Report. It shows, for each recipient, whether the recall worked, is still pending or failed.

Microsoft's recall guide has the steps for each version, and its admin documentation says recall can also be started from Outlook for Mac and the Outlook app on Android and iPhone. It keeps trying for up to 24 hours, so a “pending” result isn't the final word.

Why can't I recall an email in Outlook?

Usually because of one of these, all from Microsoft's own documentation:

• The recipient isn't on Exchange Online. You can't recall an email sent to a Gmail or Yahoo address.
• They're at another company. Recall only reaches another organization's mailboxes if their administrators have chosen to allow it from yours.
• They've already read it. Whether recall can still remove a read message is a setting your administrator controls.
• They forwarded it. Copies forwarded by hand can't be recalled.
• The button is missing. Your organization may not offer recall at all. Your IT team can tell you.

So recall is great for the “wrong attachment, whole team” moment. For an email to a client at another company, it won't help, and I'd move straight to a correction.

Picture Marcus, an operations manager whose team is split between New York, Denver and San Francisco, sending the November shift schedule to all three offices with the wrong Saturday on it. His company is on Microsoft 365, so he recalls it and replaces it with the right version, and anyone who hadn't opened it never sees the old one. But he also copied the outside staffing agency, and recall doesn't reach another company unless its administrators have allowed it. So the agency gets a short correction from him the same afternoon. Same mistake, two different fixes, decided by who's on the other end.

Too late to unsend? Here's what I'd do

First, a common myth: deleting the email from your Sent folder only deletes your copy. Theirs is still sitting in their inbox.

Then ask one question: will this mistake change what the reader does? If it won't, I'd honestly let it go. A follow-up about a missing comma draws more attention than the comma ever would. If it will, send a correction, and keep it short.

Run Greg's Friday email through that table. If he'd missed the window, $48,000 instead of $84,000 changes what the client does: they might approve the wrong budget. That's a correction, today, with the right number in the subject line. If he'd only misspelled the client's product name in the second paragraph, I'd let it go and spell it right in the next email.

Correction emails you can copy

Say you sent a meeting invite with Thursday instead of Friday. Nobody needs the story of how it happened. They need Friday, somewhere they'll see it.

Here's the correction most people send in a panic, using Greg's budget mistake:

Subject: Re: Q1 media plan

Hi Beth,

So sorry!! Please ignore my last email, I put the wrong number in. Can you disregard and I'll fix it? Really apologize for the confusion.

Greg

It apologizes three times and never says the right number, so the client still has to go back to the first email and guess. And “please ignore my last email” throws out the whole plan, not just the one line that was wrong. Here's the version I'd send:

Subject: Correction: Q1 media budget is $84,000

Hi Beth,

One fix to the plan I sent this afternoon: the Q1 budget is $84,000, not $48,000. Everything else in the plan stays the same.

Sorry for the mix-up,
Greg

The right number is in the subject line, where she'll see it in her inbox and find it again in March. These are the three I'd keep handy:

Subject: Re: [original subject]

Hi [name],

Here's the attachment I meant to include.

Thanks,
[Your name]

Subject: Correction: [meeting] is on [correct date]

Hi [name],

Small fix to my last email: the [meeting] is on [correct date] at [time and time zone], not [wrong date]. Everything else stays the same.

Sorry for the mix-up,
[Your name]

Subject: Updated: [document name]

Hi [name],

I sent you an older version of [document] earlier. The current one is attached. The only change is [what changed].

Thanks,
[Your name]

One thing I'd avoid: “Please ignore my last email” when only part of it was wrong. People will throw out the useful parts along with the mistake.

What to do if you emailed the wrong person

If it was just awkward, like a reply meant for a colleague that went to the whole thread, a short note asking them to delete it is enough. Don't repeat what was in it.

Say Greg means to tell his creative director that a client's feedback is “a lot of notes for a 15-second spot” and hits Reply All instead. One line to the client, “Sorry, that was meant for my team. Please disregard,” and then a real answer to their notes the same day. A long apology turns a small moment into a bigger one.

If it contained someone's personal details, passwords, financial information or anything confidential at work, tell your IT or security team straight away, even if you've started a recall. What matters now is who saw what, and that's much easier to handle the sooner they know.

How to avoid needing to unsend next time

• Turn on the longest Undo delay in every app you use. It costs you nothing.
• Add the recipients last. An email with no address can't go out by accident while you're still writing it.
• Schedule the important ones. In Gmail, a scheduled email can be canceled from the Scheduled folder before it sends, and it goes back to being a draft. Scheduling it for tomorrow morning gives you a night to reread it. For Greg, anything with a dollar figure in it goes out at 8 a.m. the next day, not 4:50 p.m. on a Friday.
• Check Cc and Bcc before you send. If you're not sure who sees what, our guide to Cc and Bcc explains it.
• Stuck in the Outbox? If Gmail shows an email as Queued, it hasn't actually gone out yet. Our guide to queued emails explains why that happens and how to fix it.