Unwanted emails, also known as spam or junk mail, can be a nuisance in your Outlook inbox. Fortunately, Microsoft Outlook provides several methods to block emails by senders or domains, helping you maintain a clutter-free and organized mailbox. In this comprehensive guide, we'll walk you through the steps to block the emails from certain senders in Outlook on various platforms, including Windows Desktop, Mac Desktop, Outlook on the Web, and the mobile app for both iPhone and Android devices.

• Block an email sender (by using Block Sender feature)
• Quickly block multiple emails by sender/domain/subject/body with Kutools
• Block multiple email senders/domains (by using Blocked Senders List)

• Block email senders (by using Block Sender feature)
• Block email senders/domains (by Using Blocked Senders List)

Block Emails in Outlook on the Windows Desktop

Outlook on the Windows desktop offers several ways to block emails by senders, depending on your needs. In this section, we'll cover three primary methods for blocking unwanted emails.

Block an Email Sender (Using the Block Sender Feature)

When a specific sender becomes a constant source of frustration in your inbox, you can block this sender with Outlook's Block Sender feature. This simple yet effective method ensures you won't receive any emails from that sender in the future.

Step 1: Select the email from the sender you want to block

Step 2: Enable the Block Sender Feature

1. Navigate to the Home tab, and click Junk > Block Sender.



2. A Microsoft Outlook warning dialog pops up. Click OK.

Result

The message you selected now has been moved to the Junk Email folder. Additionally, the specified sender has been added to your Blocked Senders List. As a result, all future messages from this sender will be blocked from your inbox and automatically moved to the Junk Email folder.

Quickly Block Multiple Emails by Sender/Domain/Subject/Body with Kutools

While Outlook's native Block Sender feature only permits blocking one sender at a time, Kutools for Outlook enhances this capability. With the Block Senders utility of the Junk feature in Kutools, you can block multiple email senders at once, significantly speeding up the process. What’s more, Kutools also supports blocking emails by specific domains, subjects, or keywords in the email body with only a few clicks.

In this section, we will show you how to quickly block multiple emails by sender and domain using Kutools for Outlook.

1. After selecting the emails from the senders you want to block, navigate to the Kutools tab and click Junk > Block Senders or Block Sender Domains.

2. A dialog pops up to remind you that the senders or domains have been successfully blocked. Click OK to close the dialog.

3. Another dialog pops up. Click Yes to enable the Junk feature.

The selected messages will be moved to the Junk Email folder. And from now on, all future messages from those senders or domains will be automatically blocked from your inbox and moved to the Junk Email folder.

Block Multiple Email Senders/Domains (Using Blocked Senders List)

For comprehensive blocking capabilities, you can create a list of blocked senders and domains using the Blocked Senders List of the Junk Email Options feature, ensuring you receive emails only from trusted sources.

Step 1: Go to the Home tab, and click Junk > Junk E-mail Options.

Step 2: Add the blocked senders/domains into the Blocked Senders List

1. In the popping-up Junk Email Options dialog, click the Add button under the Blocked Senders tab.



2. In the popping-up Add address or domain dialog, type the email address or domain name in the textbox. Click OK.


Note: You can add only one email address or domain name at a time.
3. Repeat the above steps to add more senders or domains as you need.

Result

Now you can see the added senders and domains in the Blocked Senders List. And from now on, all future messages from those senders or domains will be automatically blocked from your inbox and moved to the Junk Email folder.

Block Emails in Outlook on the Mac Desktop

Blocking emails in the Mac desktop version of Outlook involves its own distinct steps. We'll walk you through the process to help you maintain a clean and organized inbox on your Mac.

Step 1. Select the messages from the senders you want to block

Step 2: Enable the Block Sender Feature

1. Navigate to the toolbar and click the Block button.

2. An Outlook dialog pops up. Click OK.

Result

The messages you selected have now been moved to the Junk Email folder. From now on, all future messages from those senders or domains will be automatically blocked from your inbox and moved to the Junk Email folder.

Tip: To unblock the senders or domains, select the messages from the senders or domains you want to unblock in the Junk Email folder. Then navigate to the toolbar, and click the Report > Not Junk.

Block Emails in Outlook on the Web

Outlook on the web offers user-friendly features for blocking unwanted emails and senders, ensuring a tidy inbox. In this section, we'll introduce two methods for blocking unwanted emails when using Outlook on the web.

Block Email Senders (Using the Block Sender Feature)

Blocking emails on the web-based Outlook platform is a crucial skill for maintaining a tidy inbox and preventing unwanted emails.

Step 1: select the messages from the senders you want to block

Step 2: Enable the Block Sender Feature

1. Navigate to the top toolbar and click on the More options button in the upper-right corner.
2. Click Block> Block sender.



3. A dialog pops out. Click OK.

Result

The selected messages are now deleted, and in the future, you'll no longer receive any messages from those senders.

Block Email Senders/Domains (Using Blocked Senders List)

Outlook on the web also supports blocking email senders or domains by adding the specific senders or domains manually in the Blocked senders and domains list.

Step 1: Click the Settings button to open the Settings dialog

Step 2: : Add the blocked senders/domains using the Blocked Senders and domains list

1. In the popping-up Settings dialog, click Mail > Junk email. Then click the Add button in the Blocked senders and domains section.

2. Input the email address or domain in the textbox. For example, Here I input for blocking a sender, and input ccc.com for blocking a domain. Then press the Enter key.


Note: You can add only one email address or domain name at a time.
3. Repeat the above steps to add more senders or domains as you need.

Result

Now you can see the added senders and domains in the Blocked Senders and domains list. Click the Save button to save all changes. From now on, all future messages from those senders or domains will be blocked from your mailbox.

Block an Email in Outlook on the Mobile App (iPhone or Android Device)

Blocking an email on the Outlook mobile app is essential for keeping your inbox clean while you're on the go. We'll guide you through the steps for blocking an email on iPhone and Android.

Step 1: Select the message from the sender you want to block

Step 2: Enable the Block Sender Feature

1. Navigate to the top toolbar and click on the More options button in the upper-right corner.
2. In the drop-down menu, click Report junk > Block Sender .



3. A confirmation dialog pops up, click BLOCK SENDER .

Result

The message you selected now has been moved to the Junk folder. Additionally, all future messages from this sender will be automatically blocked from your inbox and moved to the Junk folder.

You now have a comprehensive guide on how to block emails and senders in Outlook, tailored to your specific platform. And remember that you can always unblock senders if your preferences change. If you're looking to explore more Outlook tips and tricks, please click here to access our extensive collection of over thousands of Outlook tutorials.

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