How to Block an Email Address in Outlook: Step by Step Guide

How to Block Emails Outlook - Quick Steps

• Open Microsoft Outlook
• Select the Email >> Click on the "Junk" Option
• Select "Block Sender"
• Confirm the Action

Unwanted emails, spam, and phishing attempts can clutter your inbox and pose security risks. Whether you're receiving annoying promotional emails or persistent spam, Outlook provides a built-in feature to block specific email addresses and prevent them from reaching your inbox.

In this guide, we'll walk you through the steps to block an email address in Outlook on Windows, Mac, Web, and Mobile to help you maintain a clean, organized, and secure inbox.

How to Block an Email Address in Outlook (Windows PC)

Outlook is a popular email management tool from Microsoft that helps users organize, send, and receive emails, manage calendars, and schedule tasks. If you're using the Outlook desktop app on Windows, follow these steps to block an email address:

Step 1: Open Microsoft Outlook

• Launch the Outlook app on your Windows computer.

Step 2: Select the Email from the Sender You Want to Block

• Go to your Inbox and find the email from the sender you want to block.

Step 3: Click on Junk Option

• In the Home tab, click on the Junk button in the toolbar.
• Select Block Sender from the Drop-Down

Outlook will immediately block the email address, and future emails from this sender will be moved to the Junk Email folder automatically.

Step 4: Manually Add an Email Address or Domain to the Block List

If you want to block an email address or domain manually:

• Click on "Junk" → "Junk Email Options."
• Go to the Blocked Senders tab and click "Add."
• Enter the email address or domain you want to block.
• Click OK to save the changes.

Note: Outlook allows you to block up to 1,024 email addresses or domains. If you reach the limit, consider blocking entire domains instead of individual addresses.

Step 5: Confirm and Apply Changes

• Once you’ve added the email or domain to the blocked list, click OK to confirm.
• The sender is now blocked, and their emails will automatically be directed to the Junk Email folder.

Tip: If you accidentally block someone, you can unblock them by going to Junk Email Options → Blocked Senders tab → Select the email → Click Remove.

How to Block an Email Address in Outlook for Mac

Please be aware that if you are using the new Outlook, some functions may not be active. In such cases, consider using the Outlook Web App to access all the features of Outlook. If you're using Outlook on a Mac, follow these steps to block a sender:

Step 1: Open Outlook and Select the Email

• Launch the Outlook app on your Mac.
• Navigate to your Inbox and select the email from the sender you want to block.

Step 2: Click on the "Block" Button

• Click the Block button in the toolbar at the top.
• If you don’t see the Block button, click on the three-dot menu and select Block Sender.

Step 3: Confirm the Block Action

• A confirmation message will appear asking if you want to block the sender. Click OK to confirm.

Now, emails from this sender will be automatically moved to your Junk Email folder.

How to Block an Email Address in Outlook Web App

If you use the Outlook Web App (OWA), follow these steps to block an email address:

Step 1: Sign in to Outlook Web

• Open your web browser and go to https://outlook.live.com/mail/
• Log in with your Microsoft email credentials.

Step 2: Click on the Setting icon

Go to the top right corner of the home screen and click on the settings icon.

Step 3: Select Junk E-mail

Next, from the options provided on the left-hand side of the screen, choose the "Mail" option, and then click on "Junk Email."

Step 4: Click Add and Add the User

Upon clicking "Junk Email," you will be prompted to add a user whom you want to block on Outlook. Alternatively, you can search for the user by typing their name in the search list.

Step 5: Confirm and Save Changes

After adding the user to the Junk mail list, make sure to click on the save button to save the changes. As a result, the user you have saved will now be blocked on your Outlook email.

Alternative Method:

Open an Email from the Sender You Want to Block >> Click on the Three-Dot Menu >> Select "Block" >> Confirm and Save Changes
All future emails from this sender will now go to the Junk folder.

How to Block an Email Address in Outlook Mobile

If you're using the Outlook mobile app on an Android or iPhone, follow these steps:

Step 1: Open the Outlook App

• Launch the Outlook app on your mobile device.

Step 2: Select the Email from the Sender You Want to Block

• Go to your Inbox and tap on the email.

Step 3: Open the Email Options Menu

• Tap on the three-dot menu (•••) in the top-right corner.

iPhone Tip: On an iPhone, you can easily block a sender by tapping on "From" next to the sender's name and then selecting "Block this Contact." Confirm the changes, and your iPhone will move all emails from the sender to the trash folder, ensuring your Outlook inbox remains clean and free from unwanted emails from the blocked sender.

Step 4: Choose "Report Junk"

• Select "Report Junk" from the menu.

Step 5: Click "Block Sender"

• Tap "Block Sender" to block the email address permanently.

Step 6: Confirm Your Action

• A confirmation message will appear. Click OK to finalize the block.

Tip for iPhone Users:
On iPhones, you can also block a sender by:

1. Tapping on the sender’s name at the top of the email.
2. Selecting "Block this Contact" and confirming.
3. All future emails from the sender will be automatically moved to the Trash folder.

How to Reduce Spam & Phishing Emails in Outlook

In addition to blocking email addresses, you can take these extra steps to stop spam and phishing emails:

• Mark spam as junk – Instead of just deleting spam, mark it as junk so Outlook learns to filter similar messages.
• Enable phishing protection – Turn on Microsoft Defender or Windows Security to detect phishing emails.
• Use Safe Senders List – Add trusted contacts to your Safe Senders list to prevent important emails from being marked as spam.
• Avoid clicking unknown links – Never click on suspicious links or download attachments from unknown senders.

Conclusion

A clean and organized inbox isn’t just about convenience—it’s about security and efficiency. By using Outlook’s built-in blocking features, you can effectively filter out spam emails, phishing attempts, junk mail, and unwanted senders, ensuring that your inbox stays clutter-free. Whether you're using Outlook on Windows, Mac, Web, or Mobile, these methods provide a seamless way to block suspicious email addresses and prevent cyber threats.

For enhanced protection, take advantage of Outlook’s Safe Senders List, junk email filters, phishing protection, and advanced security settings. By proactively managing your email, you can boost productivity, safeguard personal information, and reduce the risk of email scams. Stay in control of your inbox, block unwanted emails in Outlook, and enjoy a safer, more efficient email experience today!