Here you can customize the whitelist.
All mail sent by addresses listed in the whitelist are usually treated as acceptable mail (ham) because they get a big positive reputation before scanning.
The * symbol stands for any text phrase in a mail address within the given mail domain. So in standard configuration all mail coming from any mail address of jam-software.de or jam-software.com is treated as acceptable mail.
Use only one entry per line.
If the checkbox "Add recipients of outgoing mail automatically to the whitelist" is checked, all recipients of mail you sent will be automatically added to the whitelist.
Pressing the button "Add addressbook to whitelist" adds all of your Outlook contacts to the whitelist.
If you want to add mail addresses manually to the whitelist, please use for every entry a new line.