How to Block a Sender by Email Address in Outlook Mail

Bock a sender by email address or domain

An illustration of email being blocked by sender email address.

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When unwelcome spam shows up in your inbox, use Outlook Mail on the web ( to block these emails easily and avoid future spam messages from filling your inbox.

Block a Sender by Email Address in Outlook Mail on the Web

To set up a rule in Outlook Mail on the web that deletes all messages from a sender and removes all current messages from the same sender:

  1. Open a message from the sender you want to block.

    Screenshot of opening an email in Outlook for web
  2. Go to the Outlook Mail toolbar and select Sweep.

    Screenshot of sweep in Outlook on the web
  3. In the For email from dialog box, select Move all messages from the Inbox folder and any future messages.

  4. Select the Move to dropdown arrow and choose Deleted Items.

    Screenshot of moving messages to deleted items folder in Outlook web
  5. Select OK to finish.

  6. moves all messages from the specified address in the current folder to the Deleted Items folder and adds the sender to your list of blocked senders.

What Happens to Messages from Blocked Senders

Messages from senders on your blocked senders list are discarded without notice. You and the sender are not notified, and the messages do not appear in your Deleted Items or Junk Email folders.

Block Domains in Outlook on the Web

To move messages from a domain to the Deleted Items folder:

  1. Go to Settings.

    Screenshot of settings in Outlook web
  2. Select View all Outlook settings.

  3. Select Mail > Junk email.

    Screenshot of Junk email settings in Outlook web
  4. In the Blocked senders and domains section, select Add. Then enter the domain you want to block.

    Screenshot of adding a blocked domain in Outlook web
  5. Press Enter to add the domain to the blocked senders list.

  6. Select Save, then close the Settings dialog box.

Block Senders and Domains to Block Spam

Blocking specific senders or domains may not stop junk emails since spam rarely comes twice from the same address. To combat spam, report junk emails that make it to your Inbox. This procedure teaches the spam filters to recognize and filter similar messages in the future. You should also report phishing scams.