Spam Mails into Zimbra Spam Folder

[CSJN]

Hello, we need to configure our environment to receive the spam mails direct into the Zimbra spam folder. How can we do it?
We have configured from Mail Filter - Action Objects the field X-Spam-Flag: YES and we have added this object to the Rules but we continous receiving the spam mails into the Zimbra Inbox folder.
Which is the correct configuration?
Thanks.

 

[czechsys]

Configure zimbra to move mails to spam folder. PMG is only gateway, not mailserver with mailboxes.

 

[CSJN]

Configure zimbra to move mails to spam folder. PMG is only gateway, not mailserver with mailboxes.

Yes I know, but is correct my config or PMG can't send this flag?