(1) In the mails list, select those mails you intend to report as spam. Then, on the toolbar, open the Spam drop-down menu and select Add to Block List.
(2) In the [Add Block Addresses] page, all IP, Hostname or Email Addresses of the selected mails are displayed. Select those entries you intend to block and click OK.
Adding an IP will block all mails sent or forwarded from the address. Please make sure you do not want to receive mails from this IP address.
Wildcard is supported in Block Addresses List. To block a domain instead of an email address, you may use any of the following:
5. Spam Protection