Send & Receive Issues

How to Block Bulk Email and Stop Messages from a Sender in Outlook

Amos Gikunda Oct 7, 2026 869 views

Question details

The user needs to stop receiving unwanted bulk emails arriving individually from unsubscribed groups.

How to Block Bulk Email and Stop Messages from a Sender in Outlook

Product: Microsoft Outlook
Device & OS: not provided
Scenario: Filtering out unwanted bulk emails to ensure important communications are not buried or missed in the inbox.
Observed behavior: Unwanted bulk messages continuously arrive individually in the inbox, overwhelming the user and hiding critical emails.

Before you start

Before proceeding, check if the email contains a legitimate 'Unsubscribe' link. If the sender is a known company, unsubscribing is often better than blocking. Avoid interacting with links in emails that look suspicious or malicious.

Solution 1Recommended

Block the Sender Directly from the Email Message

This is the fastest method to stop receiving emails from a specific sender by utilizing Outlook's built-in junk filtering directly from your inbox.

By blocking a sender, their future emails will automatically bypass your inbox and go straight to the Junk Email folder. This method applies to the specific email address the sender is currently using.

Select the unwanted message

Open Microsoft Outlook and locate the unwanted bulk message in your inbox.

Right-click the message

Right-click on the email to open the context menu, then navigate to the 'Junk' option.

Select Block Sender

Click on 'Block Sender' from the dropdown. Outlook will notify you that the sender has been added to your Blocked Senders list.

Check Junk Email Folder

If you still see similar emails landing in your Junk Email folder, you can right-click them there and report them as Spam to further train the filter.

Block the Sender Directly from the Email Message

Report as Junk: Reporting messages as junk or spam helps Microsoft improve email filtering algorithms for all Outlook users.

Solution 2

Manually Add Senders to the Blocked Senders List

If you know the email address or domain of the spammer, you can proactively add them to your Blocked Senders list without needing to find a message from them.

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Frequently Asked Questions

Why am I still receiving emails from a blocked sender in Outlook?

The sender might be spoofing their email address or using slightly different domains to bypass your Blocked Senders list. To resolve this, consider blocking the entire domain rather than the specific email address, or create a custom Outlook rule to automatically delete emails containing specific keywords.

Does blocking a sender in Outlook notify them?

No, Outlook does not send a notification to the sender when you block them. Their emails are simply redirected to your Junk Email folder or deleted without their knowledge.

How do I unblock someone if I blocked them by mistake?

To unblock an email address, go to the Home tab > Junk > Junk Email Options. Click the Blocked Senders tab, select the email address you accidentally blocked, click 'Remove', and then hit 'OK'.

Is there a limit to how many senders I can block in Outlook?

Yes, the Blocked Senders list in Outlook is generally limited to 1,024 addresses or domains. If you reach this limit, you should start blocking entire domains or use Rules to manage unwanted emails more efficiently.

Outlook & Email Problems