To filter the spam Of your mailboxes, we recommend using the DNS blacklist .

To activate this feature in ISPmanager 5, use the following instruction.

1. Go to the ISPmanager 5 panel.
2. Go to "DNSBL List" menu item.
3. Add the following 3 domains to & nbsp;DNSBL:
   bl.spamcop.net
   dnsbl.sorbs.net
   zen.spamhaus.org