How To Unblock Email On Outlook

Why your emails are blocked and how to unblock email on Outlook fast

If a sender's messages are landing in your Junk Email folder, Outlook has them on a blocked senders list. The fastest way to unblock email on Outlook is to right-click any message from that sender in your Junk folder, choose Junk, then Never Block Sender. That single action tells Outlook to trust that address and deliver future messages straight to your inbox.

Blocked senders are managed through two lists: Blocked Senders (messages go to Junk) and Safe Senders (messages always reach your inbox). Unblocking usually means removing someone from the first list and adding them to the second. Below we cover both the quick method and the full manual process for every Outlook version.

How to manually unblock a sender in Outlook settings

If you don't have a message from the sender handy, or you want to unblock an entire domain, use the settings. The steps differ slightly between New Outlook/Outlook on the web and Classic Outlook (the desktop app).

New Outlook for Windows and Outlook on the web

1. Click the gear icon (Settings) in the top-right corner.
2. Select Mail from the settings menu, then choose Junk email.
3. Scroll to Blocked senders and domains. You'll see a list of addresses and domains currently blocked.
4. Click the trash can or remove icon next to the sender you want to unblock. Repeat for any other addresses or domains.
5. Scroll to Safe senders and domains and click Add.
6. Type the sender's full email address (e.g., name@example.com) or the domain (e.g., example.com) and press Enter.
7. Click Save at the bottom of the page.

Adding the sender to Safe Senders is the crucial second step. It prevents Outlook from re-blocking them later and ensures their messages bypass all filters.

Classic Outlook (desktop app)

1. Go to the Home tab on the ribbon.
2. In the Delete group, click Junk and select Junk E-mail Options.
3. Open the Blocked Senders tab.
4. Select the sender's address or domain from the list and click Remove.
5. Open the Safe Senders tab.
6. Click Add, type the email address or domain you just unblocked, and click OK.
7. Click OK again to close the dialog and save your changes.

If you prefer the quick route in Classic Outlook, right-click the blocked message in your Junk Email folder, choose Junk, then Never Block Sender. This automatically adds the sender to your Safe Senders list and removes them from Blocked Senders.

What to do if you can't unblock a sender in Outlook

Sometimes the standard steps don't work. Here are the most common reasons and their fixes.

You've hit the 10,000-entry list limit

Outlook allows a maximum of 10,000 addresses or domains in both your blocked senders and safe senders lists combined. If you've reached this cap, you won't be able to add new entries until you remove old ones. To resolve this, delete any outdated or unnecessary entries from both lists. If you regularly manage more than 10,000 blocked senders, consider blocking entire domains instead of individual email addresses.

Your Junk folder auto-deletes after 14 days

Outlook automatically removes messages from the Junk Email folder after 14 days, and they cannot be recovered after that point. If you're trying to find a message to right-click and unblock, but it's gone, you'll need to use the manual settings method instead. To prevent future loss, check your Junk folder regularly and mark legitimate messages as "Not Junk" before the 14-day window expires.

New Outlook doesn't support blocking for Gmail, Yahoo, or iCloud accounts

If you're using New Outlook for Windows with a third-party email account like Gmail, Yahoo, or iCloud, the blocked senders feature is not available. Microsoft intentionally disabled this function for non-Microsoft accounts. In this case, you must unblock the sender through your email provider's own settings. For Gmail, go to Settings > Filters and Blocked Addresses. For Yahoo, go to Settings > More Settings > Security and Privacy. For iCloud, go to Mail > Preferences > Blocked. Once you remove the block there, messages will flow normally into Outlook.

You need to clear a rule or filter instead

Occasionally, a custom email rule you created is what's sending messages to Junk, not the blocked senders list. To check, go to Settings (gear icon) > Mail > Rules in New Outlook, or File > Manage Rules & Alerts in Classic Outlook. Look for any rule that moves messages from that sender to Junk or deletes them, and disable or delete it. This is also a good time to clean up email by reviewing all your rules at once and removing any that are outdated or causing misdelivery.

Your email administrator has set a policy

If you're using Outlook through a work or school account, an administrator may have set a global policy that overrides your personal settings. In that case, you won't see the option to unblock, or changes won't stick. Contact your IT helpdesk and ask them to whitelist the sender at the server level. They can also check if the message is being quarantined by Microsoft Defender or Exchange Online Protection before it ever reaches your Junk folder.

Once you've resolved the issue, test by asking the sender to email you again. Check your inbox, then your Junk folder. If the message still lands in Junk, repeat the steps and verify you've added the sender to Safe Senders, not just removed them from Blocked Senders. With the right combination of list management and rule review, you'll keep legitimate messages where they belong.