How do you delay sending a single email in Outlook?

In classic Outlook for Windows, open the message, go to Options, choose Delay Delivery, and set a do-not-deliver-before date and time. In new Outlook and Outlook on the web, use the Send dropdown arrow and choose Schedule send, then pick a date and time.

Can you delay all outgoing emails in Outlook by a few minutes?

Yes, in classic Outlook for Windows. Create a rule that applies to messages you send and choose to defer delivery by a number of minutes (up to 120). New Outlook and Outlook on the web do not offer a built-in rule to delay every message; they offer a short Undo Send window instead.

What is the difference between Schedule send and Delay Delivery?

They do the same thing under different names. Schedule send is the term used in new Outlook and Outlook on the web. Delay Delivery is the term used in classic Outlook for Windows. Both hold a message until a date and time you choose.

Does a scheduled email send if my computer is off?

On Microsoft 365 and Exchange accounts the message is held on the server, so it sends even when your computer is off. For POP or IMAP accounts in classic Outlook, the message sits in the Outbox and Outlook must be open and connected at the send time.

How long is the Undo Send window in Outlook on the web?

You choose it in Settings under Mail and Compose and reply. The cancellation period can be set from 0 up to 10 seconds. During that window a Undo button appears after you send.

How to Delay or Schedule Sending an Email in Outlook

Quick answer: to delay a single message, use Schedule send (new Outlook and the web) or Delay Delivery (classic Outlook for Windows) and pick a send time. To delay every message you send by a few minutes, build a rule in classic Outlook. On the web, the closest thing is the short Undo Send window in settings.

Microsoft uses different names for the same idea across versions, which is why this feels more confusing than it should.

Last checked against Microsoft support documentation on June 5, 2026.

Delay one email: Schedule send and Delay Delivery

Most people who search for this want to write an email now and have it leave later. Every modern Outlook can do that, just with different labels.

New Outlook and Outlook on the web

Compose your message as usual.

Add recipients, subject, and body.

Click the arrow next to the Send button.

Choose Schedule send.

Pick a suggested time or select Custom time and set your own date and time.

Confirm. The message moves to your Drafts or a scheduled queue until the send time.

Because these accounts are Microsoft 365 or Outlook.com, the message is held server-side. It sends even if your laptop is closed.

Classic Outlook for Windows

Start a new message.

On the ribbon, open the Options tab.

Click Delay Delivery.

Under Delivery options, check Do not deliver before and set the date and time.

Close the properties box and click Send.

The message sits in your Outbox until that time. On Microsoft 365 and Exchange accounts it is held on the server. On POP or IMAP accounts, Outlook must be running and connected when the send time arrives, or the message waits until the next time Outlook is open and syncing.

To change or cancel it, open the Outbox, open the message, and either edit Delay Delivery or delete the message before it leaves.

Delay every email you send by N minutes (classic Outlook rule)

This is the trick people really want: a built-in cooling-off period on all outgoing mail so you can catch the typo, the wrong recipient, or the reply-all you regret. Classic Outlook for Windows supports it through a rule. New Outlook and Outlook on the web do not.

Open classic Outlook.

Go to File, then Manage Rules & Alerts (sometimes shown as Rules).

Click New Rule.

Under Start from a blank rule, choose Apply rule on messages I send, then Next.

Leave the conditions blank to apply to all sent mail and click Next. Outlook warns the rule applies to every message you send. Confirm.

Check defer delivery by a number of minutes.

In the rule description, click the underlined a number of value and set the minutes (1 to 120).

Click OK, then Next through the exceptions screen, name the rule, and Finish.

From now on, every message you send waits in the Outbox for that many minutes before leaving. To send something immediately, open it from the Outbox and send again, or just let the timer run.

One caveat worth repeating: this rule lives on your machine and needs Outlook open and online for the deferred messages to leave on time. It is a client-side rule, not a server-side one, so it does not follow you to your phone or the web.

Cancel a recently sent email: Undo Send on the web

Outlook on the web has no delay-all rule, but it does have a brief recall window. This is the equivalent of Gmail’s Undo Send.

Go to Settings.

Select Mail, then Compose and reply.

Find Undo send and set the cancellation period. You can choose from 0 to 10 seconds.

Save.

Now, right after you hit Send, an Undo button appears for that many seconds. Click it and the message returns to a draft. Miss the window and it is gone.

Ten seconds is short. It catches the obvious mistake, not the one you notice five minutes later. For real breathing room, the classic Outlook rule above is stronger.

Which method fits which version

You want to…	New Outlook	Classic Outlook (Windows)	Outlook on the web
Delay one specific message	Schedule send	Delay Delivery	Schedule send
Delay every outgoing message	Not built in	Rule: defer delivery by N minutes	Not built in
Cancel right after sending	Limited	No	Undo Send (0-10s)
Have it send while PC is off	Yes (server-held)	Yes on M365/Exchange; no on POP/IMAP	Yes (server-held)

Troubleshooting

Problem	Likely cause	Fix
Scheduled message never sent	POP/IMAP account and Outlook was closed at send time	Keep Outlook open and connected, or move to a Microsoft 365 account that holds mail server-side.
Schedule send option missing	Older or restricted build	Update Outlook, or use classic Delay Delivery instead.
Delay rule did not fire	Client-side rule and Outlook was offline	Open Outlook and let it sync; deferred mail leaves on reconnect.
Cannot find Delay Delivery	You are in new Outlook, not classic	Use Schedule send from the Send dropdown.
Undo Send window too short	Default cancellation period is low	Raise it to 10 seconds in Settings.
Message stuck in Outbox	Delay timer still running or send error	Open the message to check the delay time, or send again.

Why a deliberate delay helps your day

A short delay on outgoing mail is not just about typos. It is a small buffer between reacting and sending, and buffers matter. The same logic applies to your calendar, where padding between meetings keeps you from sprinting all day. If you want the calendar version of this idea, see what is buffer time.

Scheduling send time also lets you write when you have energy and deliver when it lands well, which pairs nicely with stepping away cleanly. If you are heading offline, set out of office in Outlook and consider an autoresponder in Outlook so messages you cannot answer yet still get a reply.

A calendar and inbox should show the truth about your day

Delaying mail is one small way to control your own pace instead of reacting to every ping. That control matters more than it looks. Meeting load and constant context-switching are what wear people down, and most calendars hide that cost rather than show it.

LifeLoad’s view is simple: your calendar and inbox should reflect the real shape of your day, including the load you are carrying. We treat workload and recovery the way Whoop and Oura treat physical strain and sleep, but for knowledge work. Tools like Schedule send help you set the pace. Seeing the pattern over weeks helps you protect it.