

In the Perform these actions section, change the box to Delete Message. This will guide you to track if there is any email tracker presents in an email.For example, you could name it something like "Blocked Addresses." In the Filter Rules window that appears, type a name for the filter.Right-click their address at the top of the message and select Create Filter From.Open a message from the sender you want to block.Mozilla Thunderbird Block a sender from a message You should see that entry disappear from the list and a "Blocked sender deleted" message in the top-middle section of the screen.In the Security and privacy section, move your mouse pointer over the e-mail address you want to unblock and click the Delete blocked sender icon that appears on the right side.Remove a blocked address from the settings menu Type the sender's e-mail address and click Save.In the window that appears to the right, click the link.


Remove blocked addresses using an existing message In the prompt that appears, click the OK button.In the drop-down menu that appears, in the third section, select Block.Right-click a message from the sender you want to block.Remove blocked addresses from the settings menu.Remove blocked addresses using an existing message.
