Blocked and Safe Senders lists

Office 365 Blocked and Safe Senders Lists

Office 365 allows users to add senders or domains to their blocked or safe senders lists.  These lists will - regardless of whether a message is marked as Junk or Not Junk by Office 365, force messages to go into your Inbox (for the Safe Senders list) or your Junk folder (for the Blocked Senders list).

  1. Open the full Outlook settings by clicking the gear icon at the top right, then choosing "View all Outlook settings" at the bottom.
    Screenshot showing the Settings button (gear icon) and the full outlook settings link within it
  2. Click on "Junk email" on the left
  3. You'll be in the Blocked Senders and Safe Senders lists.  You can add a full email address ( or a full domain ( for example) to either list.  Any mail from senders in Blocked Senders and domains will be placed in your Junk Email folder.  Any mail from someone in Safe senders or domains will not be marked as Junk.
  4. To remove an address from either the "Blocked senders and domains" or "Safe senders and domains" list, scroll through the appropriate list until you find the address (or use the search box) and then click the trash can icon next to the address/domain you want to remove.


Warning: These settings override any rules set by ITS to allow or block external senders - so you should be cautious about adding addresses to these lists.  Even if a message is detected as having fraudulent content - adding a sender to your safe senders list will allow those messages to come through.  Likewise, even if the sender is a legitimate message whitelisted by the college - if you add it to your blocked senders list, it will mark mail from that sender as Junk.

Print Article


Article ID: 41272
Wed 10/25/17 10:14 AM
Thu 10/6/22 2:58 PM