Protecting from Spam

Watch the video tutorial

To switch on spam filtering for a mailbox:

1. Go to Mail > email address > Spam Filter tab.

2. Select the checkbox Switch on spam filtering for this email
   address.

3. Specify what to do with messages classified as spam.

   • If you want to filter mail with the software on your local
     computer, select the option Mark spam messages by adding the
     following text to message subject, and then specify how spam
     filter should mark the messages recognized as spam. “X-Spam-Flag:
     YES” and “X-Spam-Status: Yes” headers are added to the message
     source by default, and if you want, the spam filter will also add
     a specific text string to the beginning of the subject line and to
     the message body.

   • If you are sure that your spam filter is accurate, you may want to
     set the filter to automatically delete all incoming messages
     recognized as spam. To do this, select the option Delete all
     spam messages.

   • (Only for Linux) If you are accessing your mailbox over IMAP
     protocol and want the spam filter to move all messages considered
     spam to the IMAP folder called Spam, select the option Move spam
     to the Spam folder.

     Because all messages are automatically removed from the Spam
     folder after 30 days, you will need to review the contents of the
     Spam folder on a regular basis to make sure you do not miss any
     important messages, and move all non-spam messages back to the
     Inbox folder.

     When the option Move spam to the Spam folder is selected, you
     can train the spam filter and improve its accuracy by moving spam
     messages from Inbox to Spam, and non-spam messages from Spam to
     Inbox.

4. If the spam filter misses many spam messages or gives many false
   positives, you need to adjust the filter sensitivity. To do so, click
   Show Advanced Settings and type in the desired value in the
   Spam filter sensitivity field.

   The default value of seven works well in most situations, but if too
   much spam gets through, decrease the sensitivity value by one and see
   if the number of uncaught spam emails decreases. If it does not,
   decrease the sensitivity further. If, on the other hand, legitimate
   mail gets tagged as spam, you need to increase the sensitivity. In
   both…