Send & Receive Issues

How to Block Spam Emails More Effectively in Microsoft Outlook

Adam DavisAdam Davis Oct 23, 2026 869 views

Question details

The user needs to know how to effectively stop spam and junk emails from reaching their Outlook Inbox.

How to Block Spam Emails More Effectively in Microsoft Outlook
Product
Microsoft Outlook
Device & OS
not provided
Scenario
Managing incoming email traffic and stopping unwanted or malicious spam messages from cluttering the main Inbox.
Observed behavior
Spam emails continue to appear in the Inbox despite previous attempts to block senders or move messages to the Junk Email folder.
Before you start

Ensure you are connected to the internet and logged into your Microsoft Outlook account to access and save your server-side junk email settings.

Solution 1Recommended

Configure the Blocked Senders List in Outlook

Add specific email addresses or domains to the Blocked Senders list to ensure their messages are automatically routed to the Junk Email folder.

Messages already sitting in your Junk Email folder have been filtered successfully, so blocking them again is unnecessary. Focus only on the spam that manages to reach your primary Inbox.

1
Select the spam email

Open your Inbox and select the unwanted message that bypassed the junk filter.

2
Block the sender

Go to the 'Home' tab on the ribbon, click on 'Junk', and select 'Block Sender' from the dropdown menu to block that specific address.

3
Open Junk Email Options

To block an entire domain or manage your lists, click 'Junk' on the Home tab again and select 'Junk Email Options'.

4
Add to Blocked Senders

Navigate to the 'Blocked Senders' tab, click 'Add', and type in the specific email address or domain you want to block permanently, then click 'OK'.

Configure the Blocked Senders List in Outlook
Safe Senders Only: If you receive an overwhelming amount of spam, you can set your Junk Email filter to 'Safe Lists Only'. This ensures only emails from people in your Safe Senders list or Contacts can reach your Inbox.
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Frequently Asked Questions

Why do I keep getting spam emails even after blocking the sender in Outlook?

Spammers often spoof email addresses or use slightly modified domain names for each new spam campaign. If the sender's email address changes even slightly, your Blocked Senders list won't catch it. Blocking the entire domain or increasing your junk email filter's strictness can be more effective in these cases.

Should I manually block emails that are already in my Junk Email folder?

No, blocking emails that are already in the Junk Email folder is redundant and unnecessary. Outlook's automatic filters have already successfully identified these messages as spam and moved them away from your Inbox.

How do I safely receive emails from unknown senders without turning off the spam filter?

You can periodically review your Junk Email folder for legitimate messages. If you find one, right-click the email, select 'Junk', and choose 'Not Junk'. This moves the email back to your Inbox and adds the sender to your Safe Senders list, ensuring their future emails are never blocked.

Can I restrict my Inbox to only receive emails from my saved contacts?

Yes. In Outlook, you can open 'Junk Email Options' and check the box for 'Safe Lists Only'. This aggressive filtering setting ensures that only emails from people or domains explicitly listed on your Safe Senders List or saved in your Contacts will ever reach your Inbox.