How to Fix Outlook Block Sender Not Working Error

Summary: This post explores how the Block Sender feature operates and discusses ways to troubleshoot Outlook block sender not working or Outlook block email not working issues that may arise. By taking these steps, users can effectively manage their inbox and ensure only relevant and important emails enter it.

Outlook’s Block Sender feature can be an efficient and useful way to automatically filter unwanted emails into their Junk Email folder, but some users may experience issues where this feature does not seem to work as it should; one such issue could be an “Outlook Block Sender Not Working” error that prevents it from filtering out unwanted mails.

To address Outlook block sender greyed out issues, users can reset their Junk Email settings. Also, check whether their email provider’s spam filter interferes with Outlook’s own filters. Another possible solution would be identifying any add-ins or third-party applications which could interfere with Outlook’s Block Sender feature and potentially cause conflicts.

Common Reasons Behind of Outlook Block Sender Not Working

One of the more frequent issues faced by Outlook users is when their Outlook never block sender not working correctly. If you continue receiving emails from senders who were previously blocked, there could be any number of reasons for it – all which may need further investigation.

  1. Make sure that you have added the sender’s email address to your block list, rather than simply marking their emails as “junk.” Additionally, ensure your Outlook settings allow for messages sent from blocked senders to go straight into the junk folder.
  2. Outlook block sender not working due to an outdated version or corrupt email profile. Ensure your Outlook application and all related add-ins are up-to-date, installing any available updates as necessary.
  3. Additionally, creating or updating your email profile by running an Office Repair on your system.
  4. Finally, it may be that emails you are receiving from a blocked sender are actually coming through another account or forwarding service and not directly from them.

In this case, adding their secondary emails addresses or domains to your block list. It may help to resolve Outlook blocked domain not working error. If you’re tired of unwanted emails cluttering your Outlook inbox, learn how to block emails on Outlook and regain control of your digital space.

What are the Methods to Fix Outlook Block Sender Not Working

Outlook users often experience trouble when the Outlook block sender not working, which prevents you from blocking unwanted emails. There are simple steps you can take to rectify the error.

Method 1: Check the Junk Email Settings Option

When reviewing your Junk Email settings, there are a few factors you need to keep in mind. First and foremost, ensure that your email client is set up to filter out unwanted messages effectively by configuring various options available under the Junk Email Options menu.

Here are the instructions for modifying the spam folder’s protection level:

  1. Launch Outlook and navigate to the Home tab.
  2. Click on the three dots located in the top right corner.
  3. Go to Junk and select Options for Junk Email.
  4. Modify the level from low/high to disable automatic filtering.
  5. Make sure to check the recommendations listed at the bottom.
  6. Apply the changes and click OK to complete the process.

Junk Email in Outlook

Once your settings have been configured appropriately. It’s essential that you conduct regular reviews of your Junk Email folder in order to identify any legitimate emails that have been mistakenly marked as spam.

Furthermore, if you’re experiencing issues with Outlook junk block sender not working correctly. Checking your Junk Email settings could be an excellent place to start troubleshooting.

By applying appropriate filters and monitoring your junk mail folder regularly. It can help to prevent unwanted emails from flooding your inbox while simultaneously solving any issues regarding blocked senders effectively.

Discover the secrets of sending emails from multiple addresses in Outlook with our comprehensive guide: How to Send Email from Different Address in Outlook.

Method 2: Clear Outlook Cache

Clearing the Outlook cache can be one of the most effective solutions to fixing issues with your email account. The cache acts as a temporary storage area that helps Outlook load faster and perform more efficiently. However, its data may become corrupted or outdated leading to various issues like emails not synching, slow performance etc. It can resolve by clearing your cache from the Outlook application.

Here are the steps to clear the Outlook cache:

  1. Ensure that Outlook is completely closed.
  2. Use the keyboard shortcut Windows key + R to open the Run dialog box.
  3. Enter %localappdata%\Microsoft\Outlook in the Run dialog box and hit Enter. This action will open the Outlook data folder.
  4. Within the displayed folder, you will find multiple files with .ost and .pst extensions. These files store the cached data.
  5. Select all the files in the folder and remove them. Please note that this action will not delete your email messages or account settings, but it will clear the locally cached data.
  6. Once you have deleted the files, restart Outlook.
  7. Outlook will automatically rebuild the cache as needed.

In addition, clearing your cache can also help fix specific errors like the Block Sender Not Working. Some users have reported experiencing it when trying to block unwanted spam emails in their inbox.

By following these simple steps and clearing your Outlook cache regularly (every few weeks, or once in a month). It can ensure that your email account stays organized and functioning effectively at all times.

Method 3: Add a Sender to the Safe Senders List

  1. Launch the Outlook application on your system.
  2. Under the Home tab, locate the Junk menu and hover your mouse over it.
  3. From the floating menu, click on Junk Email Options.
  4. Navigate to the safe senders tab.
  5. On the right menu, click Add.
  6. Enter the email addresses from which you want to receive emails.
  7. Check the box next to Also trust email from my contacts.
  8. Finally, click Apply and then OK to complete the process.

Learn how to send secure email in Outlook and protect your sensitive information with ease.

Method 4: Setup Spam Filter Rule in Outlook

  1. Launch Outlook and navigate to the File tab.
  2. In the main menu, select Manage Rules and Alerts.
  3. Under the Emails Rules tab, choose New rule.
  4. From the Stay Organized tab, select a category and click the Next button.
  5. Specify the conditions you want to use to identify emails as spam.
  6. Configure the desired actions in the specified area at the bottom.
  7. In the next window, click OK and select the Spam folder.

By following these instructions, you will be able to define conditions for spam identification. Additionally, select the Spam folder to handle those emails accordingly. Discover how to optimize your email experience by learning how to enable and disable focused inbox in Outlook for improved productivity.


In conclusion, if you are having issues with Outlook Block Sender Not Working errors, there are multiple solutions to help remedy them. First and foremost, ensure your Outlook application has all of its patches up-to-date. Furthermore try disabling any third-party add-ins which might interfere with its functionality. Additionally, check blocked senders list doesn’t become full as this could prevent new senders from being added to it.

By taking these steps and drawing upon Sysvpro support resources if needed. It will be able to address this problem directly and resume managing your inbox with ease.

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Sofia Smith is a technical content writer who has followed her passion for technology by authoring tech content at Sysvpro. Follow her on Twitter