To add an email address to your whitelist inside Mozilla Thunderbird please follow the steps below:

On a PC and Mac:

1. Click on Address Book.
2. Make sure Personal Address Book is highlighted.
3. Click New Card. This will launch a New Card window that has 3 tabs: Contact, Address & Other.
4. Under Contact, enter [wlemail] and additional information if you wish.
5. Click OK to finish.