A whitelist is a list of everyone you allow to see your letterbox. A whitelist is a good way to limit your boxes to close friends or family.

Whitelists are linked to mailing lists. The primary purpose of mailing lists is to contact groups of people you know, but they also do double duty as whitelists and exceptions if you choose to use them in that manner. A letterbox with a whitelist restriction will require members to be logged in in order to see them since Atlas Quest needs to check if they are on the whitelist.

To apply a whitelist to your boxes, you must be the owner of the letterbox, then follow these steps:

1. Create a mailing list if you don't have one already. You'll probably want to give it a name such as "My whitelist" or "My friends," then add everyone who should be a part of that group.
2. While listing or editing a letterbox, click the option to edit the Whitelist in the Restrictions section.
3. If you have any mailing lists (which you should now, if you did step #1), they'll all be listed as options for whitelists. Select the appropriate whitelist for your restrictions. If you need to view or edit the whitelist, click on the name of the mailing list to open that information on a new page.
4. Save the box. You're done!

To add or remove someone from a whitelist, edit the mailing list that is being used for that purpose. You do not have to edit or change the box listing in any way to apply such changes.