Black List
To view the black list choose the menu Server > Black List. This will display a dialog box showing the list of email accounts and web domains that are black listed. Mail from them will be rejected, unless they are on the White List.
Add
Use the add button to add a new mail address or web domain name.
Remove
To remove the entry select it in the list and choose the remove button.
Modify
To modify an existing entry choose it in the list and press the modify button.