Thunderbird does not have an option for blocking email messages from specific people or domains. However, you can use message filters to automatically dispose of unwanted messages.
Message filters operate on a per-account basis, so when you set up the filter you must configure it to act on the correct account. The easiest way to do this is:
Blocking a sender
- Click on: Tool Menu:
- Message Filter:
- On Dialog Message Filter
- Select New:
- On Dialog Filter Rules
- Enter Filter name: Block List or (Whatever name you like.)
- Check: Manually Run:
- Check: Getting New Mail:
- Select: Filter Before Junk Classification
- Select Radio Button: Match all of the Following
- Drop Down Select: From
- Drop Down Select: is
- Below Perform these actions:
- Drop Down Select: Delete Message
- Click the OK button
Blocking a domain addresses
- Click "Tools" at the top of the Mozilla Thunderbird screen and click "Message Filters" from the drop-down menu.
- Click the "New" button to create a new filter rule.
- Type in a name for your filter in the blank field. Click the tabs under the "Apply filter when" section so that they read "From" "is," and type in the email address you wish to block in the blank field.
- Click the "Move Message to" tab under the "Perform these actions" tab, and click "Delete Message" from the drop-down menu. Click the "OK" button.
- Click the "is" tab and select "ends with" from the drop-down menu to block domain addresses. Type in the domain address in the blank field, such as "@gmail.com".
- Click the "Move Message to" tab and select "Delete Message" or "Delete from POP server" from the drop-down menu. Click the "OK" button.