Mail whitelist is a list of IP addresses of mail servers, domains and mailboxes from which letters will be delivered to your mailboxes with minimal spam checking.
The whitelist is managed in the "Hosting → White list»:
To add an entry to the whitelist, do the following:
Click "
Add entry to whitelist»:

Specify the IP addresses, domains or mailboxes, mail from which should not be checked for spam (each entry in a separate line), and click "
Add to»:

To delete a specific entry, do the following:
Switch to the tab of the type you want ("IP addresses », «Domain names" or "Email addresses»).
Find the entry you want to delete in the list and click the cross next to it:

To delete all records of a specific type, do the following:
Switch to the tab of the type you want ("IP addresses », «Domain names" or "Email addresses»).
Click "
Delete everything»:

To delete all records of all types, click "Clear whitelist»: