Kerio MailServer contains the SpamAssassin antispam filter. This filter is based on content analysis (spam messages usually contain specific attributes that can be searched for and evaluated by the filter). Each message is assigned a numeric score; if this value exceeds the limit set in Kerio MailServer, the message is marked as spam.
The spam filter may let some spam messages through from time to time by mistake (their score is low) and mark some regular messages as spam (their score is too high). For the reasons above, the antispam filter allows modification to the database used for recognition of spam messages. This method, however, requires user input. Users have to reassign the incorrectly evaluated messages to correct types (spam / non-spam) so that the filter learns to recognize them in the future.
Messages which were marked incorrectly can be re-evaluated by moving them in corresponding folders. To be specific, to mark a message as spam, move it to the Junk E-mail folder. To mark a message as legitimate (if it was marked as spam incorrectly by the system), move it to Inbox.
For more comfortable moving of spam to Junk E-mail, use the button on the Apple Mail toolbar. This option is helpful where spam was let into INBOX and was not marked as spam. Simply select such messages and click on . Once the button is clicked, the message selected is moved to the Junk E-mail folder and the filter learns to mark similar messages as spam.
Warning
Unfortunately, it is not possible to add a button for cases where legitimate messages are marked as spam. This happens because the message was marked as spam in Apple Mail but it was not moved to Inbox and the spam filter would not be capable of learning the features of the message.
To make the button work correctly and move email to Junk E-mail, perform the following settings:
Select the item in the menu.
This opens a dialog with Apple Mail settings. Click on the Junk Mail icon to open the Junk Mail tab (see figure 13.1 The Junk Mail tab).
Make sure that the Perform custom actions (Click Advanced to configure) is set for the When junk mail arrives item . If not, change the setting.
Click on
to open another configuration dialog and fill the Perform the following actions entry in as described below (see figure 13.2 The Junk Mail tab, Advanced settings):
In the first menu, select Move Message.
In the second one, select the Junk E-mail folder.
The process is shown at figure 13.2 The Junk Mail tab, Advanced settings.
Click to confirm settings.
