Create a rule in MS Outlook and filter in Mozilla Thunderbird to block mail from specific addresses or domains, and set each e-mail app to notify you of new mail from an address.

How to block emails in Microsoft Outlook For this example, we used Outlook on a Windows PC with an active Microsoft 365 subscription to block emails with the following steps.

Setting up blocked senders on Outlook.com is a straightforward process that involves a few clicks and entries to configure 'bad' domains and addresses that pose a threat to a clean inbox.

How to block an email address in Outlook: Outlook email users can set up a rule to automatically delete all messages from a specific sender.

Once a person is added to the Blocked Senders list, all email received from their address automatically bypasses your Inbox and instead lands directly in Outlook's Junk E-Mail folder.