Block or unblock senders

Please follow the instructions below on how you can block or unblock e-mail addresses in Outlook. Outlook will automatically move messages from the blocked sender into the junk e-mail folder. This can be useful to reduce the amount of spam and potentially harmful content in your inbox.

Note: We no longer provide technical support for Apple Mail as it is not compatible within our Microsoft 365 environment. Please use the free Outlook app for both macOS and iOS devices. 

Block or Unblock Senders for Windows

Outlook for Windows (New)

Blocking senders:

  1. In New Outlook, select and right-click on the e-mail you would like to add to the blocked senders list.
  2. From the dropdown menu, click “Block” and then “Block sender”.

Unblocking senders:

  1. In New Outlook, click the “Settings” gear icon on the top right corner.
  2. Click “Mail” on the left-hand side.
  3. Click “Junk email” from the list.
  4. Under the “Senders” heading, click the “Blocked senders and domains” tab.
  5. Hover your cursor over the e-mail address you would like to unblock and click the trash can icon on the right to remove them from the blocked senders list.
  6. Click “Save” to save your changes.

Outlook for Windows (Old)

Blocking senders: 

  1. In Classic Outlook, select and right-click on the e-mail you would like to add to the blocked senders list.
  2. From the dropdown menu, click “Block” and then “Block Sender”.

Unblocking senders:

  1. In Classic Outlook, click the “Home” tab on the top file menu.
  2. In the Delete section, click on “Block”.
  3. In the dropdown menu, click “Junk E-mail Options…”.
  4. A new window will pop open. Click the “Blocked Senders” tab.
  5. Click the e-mail address you want to unblock and click “Remove” to remove them from the blocked senders list.
  6. Click “Apply” and then click “OK” to save your changes.

Block or Unblock Senders for Mac

Outlook for Mac (New)

Blocking senders:

  1. In New Outlook, select and right-click on the e-mail you would like to add to the blocked senders list.
  2. From the dropdown menu, click “Block”.
  3. A confirmation window will popup, click “OK”.

Unblocking senders:

  1. In New Outlook, click the “Outlook” tab in the top file menu.
  2. From the dropdown menu, click “Settings…”.
  3. A new window will pop out, click “Junk”.
  4. Click the “Blocked Senders” tab.
  5. Click on the e-mail address you want to unblock and then click the  “-” icon to remove them from the blocked senders list.

Outlook for Mac (Old)

Blocking senders:

  1. In Legacy Outlook, select and right-click on the e-mail you would like to add to the blocked senders list.
  2. From the dropdown menu, click “Junk Mail” and then “Block Sender”.

Unblocking senders:

  1. Login to the Outlook Web App.
  2. On the top right corner, click the “Settings” gear icon.
  3. Click “Mail” on the left-hand side.
  4. Click “Junk email” from the list.
  5. Under the “Senders” heading, click the “Blocked senders and domains” tab.
  6. Hover your cursor over the e-mail address you want to unblock and click the trash can icon on the right to remove them from the blocked senders list.
  7. Click “Save” to save your changes.

Block or Unblock Senders for Outlook Web App

Outlook Web App

Blocking senders:

  1. Login to the Outlook Web App.
  2. On the top right corner, click the “Settings” gear icon.
  3. Click “Mail” on the left-hand side.
  4. Click “Junk” email from the list.
  5. Under the “Senders” heading, click the “Blocked senders and domains” tab.
  6. Click  “+ Add blocked sender” and enter e-mail address you would like to block.
  7. Click “Save” to save your changes.

Unblocking senders:

  1. Login to the Outlook Web App.
  2. On the top right corner, click the “Settings” gear icon.
  3. Click “Mail” on the left-hand side.
  4. Click “Junk email” from the list.
  5. Under the “Senders” heading, click the “Blocked senders and domains” tab.
  6. Hover your cursor over the e-mail address you want to unblock and click the trash can icon on the right to remove them from the blocked senders list.
  7. Click “Save” to save your changes.