"Move to Spam folder" not working for forwarded messages

[mmic9net]

I have three mailboxes: ddd@eee forwards to ccc@bbb, ccc@bbb forwards to aaa@bbb.
Everyone has spam filter enabled and option "Move to Spam folder" selected.

This messagge has been correctly recognised as spam but not moved to Spam folder... why this?

Return-Path: <trojlita384@gmail.com>
X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on xxx.yyy
X-Spam-Flag: YES
X-Spam-Level: ********
X-Spam-Status: Yes, score=8.4 required=3.0 tests=BAYES_99,BAYES_999,
DKIM_ADSP_CUSTOM_MED,FREEMAIL_ENVFROM_END_DIGIT,FREEMAIL_FROM,
NML_ADSP_CUSTOM_MED,RCVD_IN_BRBL_LASTEXT,RCVD_IN_RP_RNBL,RDNS_NONE,
URIBL_BLOCKED autolearn=no version=3.3.2
X-Spam-Report:
* 3.5 BAYES_99 BODY: Bayes spam probability is 99 to 100%
* [score: 0.9994]
* 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider
* (trojlita384[at]gmail.com)
* 0.0 DKIM_ADSP_CUSTOM_MED No valid author signature, adsp_override is
* CUSTOM_MED
* 0.2 FREEMAIL_ENVFROM_END_DIGIT Envelope-from freemail username ends in
* digit (trojlita384[at]gmail.com)
* 0.2 BAYES_999 BODY: Bayes spam probability is 99.9 to 100%
* [score: 0.9994]
* 1.3 RCVD_IN_RP_RNBL RBL: Relay in RNBL,
* https://senderscore.org/blacklistlookup/
* [203.255.31.195 listed in bl.score.senderscore.com]
* 1.4 RCVD_IN_BRBL_LASTEXT RBL: RCVD_IN_BRBL_LASTEXT
* [203.255.31.195 listed in bb.barracudacentral.org]
* 0.0 URIBL_BLOCKED ADMINISTRATOR NOTICE: The query to URIBL was blocked.
* See http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block
* for more information.
* [URIs: instabuygram.cn]
* 0.8 RDNS_NONE Delivered to internal network by a host with no rDNS
* 0.9 NML_ADSP_CUSTOM_MED ADSP custom_med hit, and not from a mailing list
X-Original-To: aaa@bbb
Delivered-To: aaa@bbb
Received: by xxx.yyy (Postfix, from userid 30)
id 544202C085; Mon, 29 Feb 2016 10:41:34 +0100 (CET)
X-Original-To: ccc@bbb
Delivered-To: ccc@bbb
Received: by xxx.yyy (Postfix, from userid 30)
id 245C72C072; Mon, 29 Feb 2016 10:41:19 +0100 (CET)
X-Original-To: ddd@eee
Delivered-To: ddd@eee
Received: from gmail.com (unknown [203.255.31.195])
by xxx.yyy (Postfix) with SMTP id 631732C085
for <ddd@eee>; Mon, 29 Feb 2016 10:41:00 +0100 (CET)
Message-ID: <BD95F1F8.27E74A8C@gmail.com>
Date: Mon, 29 Feb 2016 01:41:04 -0800
Reply-To: "DANIEL" <trojlita384@gmail.com>
From: "DANIEL" <trojlita384@gmail.com>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB;
rv:1.8.1.21) Gecko/20090302 Thunderbird/2.0.0.21
X-Accept-Language: en-us
MIME-Version: 1.0
To: <ddd@eee>
Subject: re: fast instagram followers
Content-Type: text/plain;
charset="us-ascii"
Content-Transfer-Encoding: 7bit
X-PPP-Message-ID: <20160229094134.10899.3519@localhost.localdomain>
X-PPP-Vhost: bbb