Update address whitelist mail settings

**This endpoint allows you to update your current email address whitelist settings.** You can select whether or not this setting should be enabled by assigning the `enabled` field a `true` or `false` value. Passing only the `enabled` field to this endpoint will not alter your current `list` of whitelist entries. However, any modifications to your `list` of entries will overwrite the entire list. For this reason, you must included all existing entries you wish to retain in your `list` in add...