Blacklist (always block certain senders)
If you periodically receive spam or other undesired mails from a certain sender or domain, you can add the sender to your blacklist. Emails from senders on the blacklist will always be categorized as spam, even if the emails would otherwise have passed the spam check.
To manage the blacklist, follow these steps:
Open My Panel
In the spam filter configuration, select the desired email address and select Configuring whitelists and blacklists.
Enter the email address or domain in the text field under Blacklist if you would like the spam filter to categorize all emails from this address/sender as spam.
You can enter a specific email address (e.g. email@example.com) or *@domain.ending to block the entire domain.
Click Add to confirm your entry.