If Spam Filtering settings for mailbox owners are enabled by Administrator, a mailbox owner can manage his own black, white, unblack, and unwhite lists.

Black list contains addresses all correspondence from which will be marked as spam. White list contains addresses all correspondence from which will be received ignoring Spam Filtering rules.

By default, black (white) lists of mailbox owners are blank.

In Plesk for Unix, Spam Filtering is performed according to server lists (it means server wide settings are used) by default. To receive messages from addresses that are found in server black list without a spam mark, a mailbox owner should add them to unblack list. If messages from addresses found in server white list are considered requiring spam filtering, the addresses should be added to unwhite list.

In Plesk for Windows, users can turn off Spam Filtering according to server settings and filter incoming messages using only their own black (white) lists. For information on how to change Spam filtering method, refer to the Spam Filtering Preferences section.

The set forth below example helps to clarify how do lists of a mailbox owner form.

The following table shows possible server patterns:

The following table shows possible patterns of a mailbox owner:

If the Spam Filtering for the mailbox owner is done according to server and personal Spam Filtering settings, the patterns lists for the user look as follows: