
To block email addresses in Outlook, you can use the Junk Email Filter, which can automatically block senders who are likely to be spam. This filter can be adjusted to your liking, and you can also add specific senders to the Blocked Senders list.
To access the Blocked Senders list, go to the Home tab in Outlook and click on the Junk button, then select Blocked Senders. From here, you can add email addresses to the list by clicking on the "Add" button.
You can also block senders by right-clicking on an email message and selecting "Junk" then "Block Sender". This will add the sender's email address to the Blocked Senders list.
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Blocking Email Addresses
Blocking email addresses in Outlook is a straightforward process that can help you manage unwanted emails and reduce clutter in your inbox. You can block up to 1,024 email addresses or domains.
To block an email address manually, click on "Junk" → "Junk Email Options" and then go to the Blocked Senders tab. From there, click "Add" and enter the email address or domain you want to block. Click OK to save the changes.
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If you're using the Outlook desktop app on Windows, follow these steps to block an email address. You can also use the Outlook Web App (OWA) to block an email address, but the process is slightly different.
To block an email address in the Outlook Web App, you can follow the alternative method. Note that you can block up to 1,024 email addresses or domains in Outlook.
To manually add an email address or domain to the block list, follow these steps:
- 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.
Managing Senders
You can block unwanted email addresses in Outlook by adding them to your blocked senders list. This will redirect future emails from these senders to your Junk Email folder.
To block an email address, you can right-click on a message from the sender you want to block and select Junk > Block Sender. Alternatively, you can go to Settings > Mail > Junk email and add the email address to the Blocked senders list.
If you have multiple accounts added to Outlook, make sure to select the account you want to add the settings to before blocking a sender.
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Manage Senders
You can block unwanted senders in Outlook to reduce the amount of spam in your inbox. To do this, select Settings > Mail > Junk email.
If you have more than one account added to new Outlook, select the account you want to add the settings to. You can block an email address by entering it in Blocked senders and selecting Add, or block all email from a domain by entering the domain name in Blocked domains and selecting Add.
Right-clicking a message from the sender you want to block and clicking Junk > Block Sender is another way to block a sender in classic Outlook for Windows.
You can block up to 1,024 email addresses or domains in Outlook. If you reach this limit, consider blocking entire domains instead of individual addresses.
To add a specific email address or domain to the blocked senders list, follow these steps: On the Home tab, click on Junk and select Junk E-mail Options… from the menu. On the Blocked Senders tab, click the Add button.
Blocking a sender does not stop their emails from reaching your Outlook, but rather redirects them to the Junk Email folder. This can still clutter your email account.
Messages by Country/Region Code

In Classic Outlook, you can block messages from particular countries/regions using the Blocked Top-Level Domains List.
To do this, click Junk on the Home tab and then click Junk E-mail Options. On the International tab, you'll find the Blocked Top-Level Domain List.
Selecting the check box for a country/region code, such as CA (Canada), US (United States), or MX (Mexico), will block messages from email addresses that end in those codes.
For example, selecting the CA check box will block messages that come from email addresses that end in "ca".
You can also click Select All to block messages from all countries/region codes listed.
Here's a list of some country/region codes you can block:
- CA (Canada)
- US (United States)
- MX (Mexico)
- Additional country/region codes appear in the list.
After selecting the country/region codes you want to block, click OK in both open dialog boxes to save your changes.
Adding and Removing Addresses
To add an email address to the blocked senders list, you can manually add it by clicking on "Junk" → "Junk Email Options" and then selecting the Blocked Senders tab. From there, click "Add" and enter the email address or domain you want to block.
You can block up to 1,024 email addresses or domains in Outlook. If you reach this limit, consider blocking entire domains instead of individual addresses to free up space.
To add a specific email address or domain to the blocked senders list, follow these steps: click on the Home tab, click on Junk, and select Junk E-mail Options… from the menu. Then, on the Blocked Senders tab, click the Add button.
A dialog box will appear where you can enter an e-mail address or domain name that you want to restrict. Click OK after typing it.
Confirm and Apply Changes
To confirm and apply the changes, click OK after adding an email or domain to the blocked list. This will ensure that the sender is blocked and their emails are directed to the Junk Email folder.
Once you've blocked someone, you can unblock them by going to Junk Email Options → Blocked Senders tab → Select the email → Click Remove.
A confirmation message will appear asking if you want to block the sender, and clicking OK will confirm the block action.
Now, emails from this sender will be automatically moved to your Junk Email folder.
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Outlook App
If you're using the Outlook mobile app on an Android or iPhone, you can block an email address by following the steps outlined in the Outlook mobile app section.
To block an email address in Outlook mobile, you'll need to be using the app on an Android or iPhone device.
The steps to block an email address in Outlook mobile are straightforward and easy to follow, even for those who are new to the app.
Follow these steps: if you're using the Outlook mobile app on an Android or iPhone, follow these steps.
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Windows and Mac
If you're receiving unwanted email in Outlook, you can block the email addresses and domains you don't want to receive messages from.
To block email addresses and domains in new Outlook for Windows, select the account you want to add the settings to, then select Settings > Mail > Junk email.
You can add email addresses or domains to your blocked senders list to move these messages directly to your Junk Email folder. Email is automatically removed from the Junk Email folder after 14 days and can't be recovered after that.
To block a sender in Outlook, right-click a message from the sender you want to block, and then select Block > Block Sender.
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Senders for Windows

If you're receiving unwanted email in Windows, you can block the email addresses and domains you don't want to receive messages from in new Outlook. Add any email address or domain to your blocked senders list to move these messages directly to your Junk Email folder.
You can block an email address by entering it in Blocked senders and selecting Add, or block all email from a domain by entering the domain name in Blocked domains and selecting Add.
Email is automatically removed from the Junk Email folder after 14 days and can't be recovered after that.
To block a sender in new Outlook, follow these steps:
- Select the account you want to add the settings to.
- Select Settings > Mail > Junk email.
- Enter the email address in Blocked senders and select Add, or enter the domain name in Blocked domains and select Add.
- Select Save.
In classic Outlook for Windows, you can block a sender by right-clicking a message from the sender you want to block, and then clicking Junk > Block Sender.

The blocked person can still send you mail, but if anything from their email address makes it to your email account, it's immediately moved to the Junk Email folder.
To block a sender in Outlook, follow these steps:
- Right-click a message from the sender you want to block, and then click Junk > Block Sender.
You can also block a sender in Outlook by selecting a message from the sender, then selecting Message > Block in the Outlook menu.
Mac Address
If you're using Outlook on a Mac, you can block a sender by following the steps outlined in the instructions. The new Outlook may not have all the active features, so you might need to use the Outlook Web App to access all the features.
Some users may be familiar with the limitations of the new Outlook, but it's worth noting that not all users are aware of this. To block a sender in Outlook for Mac, you'll need to follow a specific process.
You can block an email address in Outlook for Mac by following these steps, but keep in mind that some functions may not be active. If you're not sure how to block a sender, you can always consider using the Outlook Web App instead.
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Other Options
In Outlook, blocking an email address is a straightforward process that can be completed in a few clicks. You can block an email address by clicking on the Junk button in the toolbar.
To move emails from a blocked sender to the Junk Email folder, select Block Sender from the drop-down menu. This will automatically block future emails from this sender.
If you're looking for more options, here are a few additional steps you can take:
- Outlook will immediately block the email address.
- Future emails from this sender will be moved to the Junk Email folder automatically.
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