To add entries to the black or white list:

1. Go to the corresponding tab of the Tools & Settings > Spam Filter Settings page.

2. Click Add Addresses.

3. Provide the list of entries you want to add to the list.

Separate addresses with a comma, a colon, or a white space. You can use an asterisk (*) as a substitute for a     number of letters, and question mark (?) as a substitute for a single letter. 

For example:, user?, * Specifying * will block the entire mail domain If you use a Windows-based server, also specify what to do with messages coming from the specified addresses.

4. Click OK.

To remove entries from the black or white list:

Select the entries on the corresponding tab and click Remove.