How To Send High Priority Email In Outlook

Sending a high priority email in Outlook ensures your urgent message stands out in crowded inboxes. If you have ever wondered how to send high priority email in outlook, the process is simpler than you might think. This guide walks you through every step, from desktop to mobile, so your important emails get noticed fast.

Why Use High Priority In Outlook

Marking an email as high priority adds a red exclamation mark in the recipient’s inbox. This visual cue signals urgency without you having to write “URGENT” in the subject line. It helps your message rise above the noise of daily correspondence.

However, use this feature sparingly. Overusing it can desensitize recipients. Reserve high priority for truly time-sensitive matters like project deadlines, critical approvals, or urgent client requests.

Here is the complete method for desktop, web, and mobile versions. Follow these steps exactly to ensure your priority flag appears correctly.

On Outlook Desktop (Windows & Mac)

This is the most common version. The steps are nearly identical for Outlook 2016, 2019, and Microsoft 365.

Open Outlook and click “New Email” to create a message.
In the new message window, locate the “Tags” group on the ribbon (usually under the “Message” tab).
Click the “High Importance” button. It looks like a red exclamation mark. The button will highlight to show it is active.
Compose your email as usual, then click “Send.”

That is all. Your recipient will see a red exclamation mark next to the subject line in their inbox. For extra emphasis, you can also mark it as “Low Importance” using the blue down arrow button if needed.

On Outlook Web (Outlook.com)

The web version works slightly differently. Here is how to set priority.

Log in to Outlook.com and click “New message.”
In the compose pane, look for the three-dot menu (More options) at the bottom right.
Click the three dots, then select “High importance” from the dropdown menu. A red exclamation mark will appear next to the subject line.
Write your message and hit “Send.”

Note: On the web, the high priority flag is not as prominent as in the desktop app. It appears as a small icon next to the subject, not a full banner. Still, it works.

On Outlook Mobile (IOS & Android)

Mobile users can also set priority. The process varies slightly between platforms.

On iPhone (iOS)

Open the Outlook app and tap the compose icon (pencil or plus).
Tap the three-dot menu (More) at the top right of the compose screen.
Select “High importance” from the list. A red exclamation mark will appear in the subject field.
Complete your email and tap the send arrow.

On Android

Open Outlook and tap the compose button (circle with a plus).
Tap the three-dot menu at the top right.
Choose “High importance.” The icon appears.
Send as usual.

On mobile, the priority flag is visible in the recipient’s inbox but may be smaller than on desktop. It still conveys urgency effectively.

Setting Priority Before Sending

You can also set priority for emails you are drafting. This is useful if you write emails in advance and schedule them.

Create a new email and set the priority as described above.
Instead of sending immediately, click the dropdown arrow next to “Send” and choose “Send later.”
Pick a date and time. The email will be sent with the high priority flag intact.

This works in Outlook desktop and web. On mobile, scheduling is also supported but the priority setting must be applied before scheduling.

Using Rules To Automatically Mark Emails

If you frequently send high priority emails to specific people, you can automate the process with rules. This saves time and reduces manual effort.

Go to “File” > “Manage Rules & Alerts” in Outlook desktop.
Click “New Rule.”
Select “Apply rule on messages I send.”
Choose conditions (e.g., sent to a specific person or with certain words in the subject).
Under “Do the following,” select “assign importance” and choose “high.”
Finish the rule wizard. Now every email meeting your conditions will automatically be high priority.

Be careful with this. If you set too many automatic rules, you might mark non-urgent emails as high priority. Review your rules periodically.

Checking If Your Email Was Sent As High Priority

After sending, you can verify the priority setting in your Sent Items folder.

Go to “Sent Items.”
Open the email you just sent.
Look for the red exclamation mark icon in the message header. If it is there, the priority was applied correctly.

If you do not see the icon, the email was sent as normal priority. Double-check your steps and resend if needed.

What Recipients See

Understanding the recipient’s perspective helps you use this feature effectively.

Outlook Desktop: A red exclamation mark appears next to the subject in the inbox list. The message header also shows “High Importance” in the reading pane.
Outlook Web: A small red exclamation icon appears next to the subject. No additional banner.
Mobile (iOS/Android): A red exclamation mark shows in the inbox list, but it is smaller than on desktop.
Other Email Clients (Gmail, Yahoo, etc.): Most clients ignore Outlook’s priority flag. The email will appear as normal. Do not rely on this feature for non-Outlook users.

For recipients using Outlook, the flag is a clear signal. For others, consider adding a brief note in the subject line like “URGENT: [Subject]” to ensure visibility.

Common Mistakes To Avoid

Even experienced users make errors. Here are pitfalls to watch for.

Forgetting to set priority before sending: You cannot change priority after the email is sent. Double-check before clicking send.
Using high priority for routine messages: This trains recipients to ignore the flag. Reserve it for true emergencies.
Assuming all clients respect the flag: As mentioned, Gmail and others do not show it. Use alternative methods for those recipients.
Setting priority on replies incorrectly: When replying, the priority of the original email does not carry over. Set it manually if needed.
Overlooking the “Low Importance” option: If you mark something as low priority by accident, it may be overlooked. Check before sending.

Advanced Tips For Power Users

Once you master the basics, these tips can streamline your workflow.

Keyboard Shortcuts

In Outlook desktop, you can set priority without using the mouse.

Press Alt + H to go to the Message tab.
Then press P to toggle high priority.
Or press Alt + H, then L for low priority.

This is faster than clicking through menus.

Using Templates With Priority

Create email templates that include high priority preset. This is useful for recurring urgent messages like daily status reports.

Compose an email with the priority set to high.
Go to “File” > “Save As” and choose “Outlook Template (*.oft).”
To use the template, click “New Items” > “More Items” > “Choose Form” and select your template.

The priority will be applied automatically.

Combining With Delivery And Read Receipts

For critical emails, combine high priority with delivery and read receipts.

In the new email window, go to “Options” tab.
Check “Request a Delivery Receipt” and “Request a Read Receipt.”
Then set high priority as usual.

This gives you confirmation that the email was delivered and opened. Use this sparingly as it can annoy recipients.

Troubleshooting Priority Issues

Sometimes the priority flag does not appear as expected. Here are common fixes.

Flag not showing in Sent Items: You may have forgotten to set it. Resend with priority.
Recipient does not see the flag: They may be using a non-Outlook client. Consider adding “URGENT” to the subject.
Priority button is grayed out: This can happen if you are using a shared mailbox or delegate access. Check your permissions.
Rule not applying: Ensure the rule is enabled and conditions are correct. Test with a sample email.

If problems persist, restart Outlook or check for updates. Microsoft frequently patches bugs related to priority flags.

Best Practices For Urgent Emails

Using high priority is just one part of effective urgent communication. Follow these guidelines.

Clear subject line: Use “URGENT: [Specific Topic]” to reinforce the priority flag.
Short message body: Get straight to the point. State the action needed and deadline.
Use call to action: Tell the recipient exactly what to do (e.g., “Please approve by 3 PM today”).
Follow up: If no response within a reasonable time, send a polite reminder.
Avoid multiple high priority emails: Sending several in one day reduces their impact.

Frequently Asked Questions

Can I Set High Priority After Sending An Email?

No, once sent, you cannot change the priority. You must recall or resend the email with the correct setting. Recall works only if both you and the recipient use Exchange or Microsoft 365.

Does High Priority Work In Outlook For Mac?

Yes, the process is similar. In the new message window, click the “High Importance” button in the toolbar. The icon looks the same as on Windows.

How Do I Remove High Priority From An Email I Am Composing?

Click the “High Importance” button again to toggle it off. The red exclamation mark will disappear from the subject field.

Can I Set High Priority For Multiple Recipients At Once?

Yes, the priority applies to all recipients of the email. You do not need to set it individually for each person.

Is There A Way To See If A Received Email Is High Priority Without Opening It?

Yes, in Outlook desktop, the red exclamation mark appears in the inbox list. In web and mobile, the icon is also visible before opening.

Final Thoughts

Mastering how to send high priority email in outlook takes only a few clicks, but using it wisely makes all the difference. Apply the flag only when truly necessary, combine it with clear communication, and always verify it was sent correctly. Your recipients will appreciate the clarity, and your urgent messages will get the attention they deserve.

Now you have all the steps and tips. Go ahead and mark your next important email as high priority—your inbox will thank you.