Email Whitelist | timato-productions

Select a message from the sender you want to add to the Safe Senders List, then go to the Home tab.
In the Delete group, select Junk.
Select Never Block Sender.
In the confirmation dialog box, select OK.

Apple Mail

Select Mail | Preferences from the menu bar in Mac OS X Mail.
Click the Rules tab.
Click Add Rule.
Type a name in the Description field, such as "Whitelist: taxcaddy.com" to identify the new rule.
Make sure the criteria reads If any of the following conditions are met and that the From field is followed by Ends with.
Enter the domain name you want to whitelist in the field next to the Ends with field. Add an @ sign before the domain name to make the filter specific. For example, to whitelist all mail from the taxcaddy.com domain type "@taxcaddy.com" into the field.
Click the plus sign next to the last condition to add another domain with the same criteria if you want to whitelist several domains.
In the Perform the following actions section set the three fields to Move Message, to the mailbox, and Inbox or a different target folder.
Click OK to save the rule.
Close the Rules window.

Thunderbird

Open Thunderbird.
Click the tools button (it looks like three horizontal lines).
Click [Message Filters].
Click [New].
Enter “Whitelist” as the Filter name:
Under Apply filter when, check the box Manually Run.
Check the box Getting New Mail.
Select [Filter after Junk Classification] from the drop down box.
Select [From] from the first drop down box.
Select [contains] from the second drop down box.
Enter an email address in the text box to the right similar to the examples below:
Under Perform these actions, verify Move Messages to is selected.
In the second drop down box, scroll over your email address and select [Inbox].
Click [OK].
Close the Message Filters window.
Locate the Junk folder in your folder list. Right-click on [Junk] and select [Properties].
Put a check mark next to the option, When getting new messages for this account, always check this folder.

This will force Thunderbird to automatically apply the filter to new email messages delivered to the Junk folder.