Incoming mail received from senders listed in the Sender Block list will always be blocked, regardless of the message classification.
1. Login to the spam filtering service.
2. Go to "Incoming - Protection Settings" > "Sender block list".
3. Click on Block sender.
4. When Block sender window pops up, fill in the following information:
Local-part: specify the local-part of the recipient address at the domain or leave blank to apply to the whole domain
For example, to apply the entry to user1@domainname.com, only enter user1 in the local part (please replace user1 with the actual sender's username). Leave this box blank if to apply to the whole domain.
Sender Flags: Apply to both
Address: Enter the sender's email address
To add a whole domain to the sender Block list, use a wildcard here by entering the domain in the format: *@domainname.com (please replace domainname.com with actual domain name).
5. Click Save to save the changes.