>info: found bounced sender: <>

If there is no envelope sender provided (it's a bounce mail) - the 'from' 
header check is skipped.

>[scoring] MSGID-sig check failed for bounce sender

If all your outgoing mails are msgid tagged by assp - block on this check.

At least

is listed by [CACHE] ips.backscatterer.org    +  MSGID-sig check failed 
for bounce sender     =    should be blocked by the penalty box 
MessageScore 


Thomas





Von:    Brunner Markus <[email protected]>
An:     For Users of ASSP <[email protected]>
Datum:  31.05.2017 17:03
Betreff:        Re: [Assp-user] DoNoSpoofing4From



Hi,
 
'DoNoFrom' is set to score and nofromValencePB is set to 50. But it was 
not added to total score.
 
 
17-05-10.maillog.txt:May-10-17 21:27:54 m1-44474-10908 [Worker_1] 
[TLS-out] [isbounce] 85.128.182.51 bounce message detected
17-05-10.maillog.txt:May-10-17 21:27:54 m1-44474-10908 [Worker_1] 
[TLS-out] 85.128.182.51 to: [email protected] [scoring] SPF: none 
(cache) ip=85.128.182.51 [email protected] 
helo=alz51.rev.netart.pl
17-05-10.maillog.txt:May-10-17 21:27:54 m1-44474-10908 [Worker_1] 
[TLS-out] [DNSBL] 85.128.182.51 to: [email protected] [scoring] 
DNSBL: neutral, 85.128.182.51 listed in l2.apews.org
17-05-10.maillog.txt:May-10-17 21:27:54 m1-44474-10908 [Worker_1] 
[TLS-out] 85.128.182.51 to: [email protected] Message-Score: added 17 
for DNSBL: neutral, 85.128.182.51 listed in l2.apews.org, total score for 
this message is now 17
17-05-10.maillog.txt:May-10-17 21:27:54 m1-44474-10908 [Worker_1] 
[TLS-out] 85.128.182.51 to: [email protected] [monitoring] IP: 
85.128.182.51 is listed by [CACHE] ips.backscatterer.org
17-05-10.maillog.txt:May-10-17 21:27:54 m1-44474-10908 [Worker_1] 
[TLS-out] 85.128.182.51 to: [email protected] HMM-Check has given 
less than 6 results - using monitoring mode only
17-05-10.maillog.txt:May-10-17 21:27:54 m1-44474-10908 [Worker_1] 
[TLS-out] 85.128.182.51 to: [email protected] HMM Check [monitoring] 
- Prob: 0.00000 => ham - answer/query relation: 6% of 46
17-05-10.maillog.txt:May-10-17 21:27:54 m1-44474-10908 [Worker_1] 
[TLS-out] 85.128.182.51 to: [email protected] Bayesian Check 
[scoring] - Prob: 0.00000 => ham - answer/query relation: 54% of 48
17-05-10.maillog.txt:May-10-17 21:27:54 m1-44474-10908 [Worker_1] 
[TLS-out] 85.128.182.51 to: [email protected] info: found bounced 
sender: <> and recipient: <[email protected]> without valid 
MSGID-signature
17-05-10.maillog.txt:May-10-17 21:27:54 m1-44474-10908 [Worker_1] 
[TLS-out] [MSGID-sig] 85.128.182.51 to: [email protected] [scoring] 
MSGID-sig check failed for bounce sender
17-05-10.maillog.txt:May-10-17 21:27:54 m1-44474-10908 [Worker_1] 
[TLS-out] 85.128.182.51 to: [email protected] Message-Score: added 25 
(fbmtvValencePB) for MSGID-sig check failed for bounce sender , total 
score for this message is now 42
17-05-10.maillog.txt:May-10-17 21:27:54 m1-44474-10908 [Worker_1] 
[TLS-out] 85.128.182.51 to: [email protected] [Plugin] calling plugin 
ASSP_AFC
17-05-10.maillog.txt:May-10-17 21:27:55 m1-44474-10908 [Worker_1] 
[TLS-out] [MessageOK] 85.128.182.51 to: [email protected] message ok 
[Invoice 81687624195 Crist Leah]
17-05-10.maillog.txt:May-10-17 21:27:55 m1-44474-10908 [Worker_1] 
[TLS-out] 85.128.182.51 to: [email protected] info: PB-IP-Score for 
'85.128.182.0' is 0, added 17 in this session
 
 
Why?
 
Markus
 
 
Von: Thomas Eckardt [mailto:[email protected]] 
Gesendet: Mittwoch, 31. Mai 2017 16:44
An: For Users of ASSP <[email protected]>
Betreff: Re: [Assp-user] DoNoSpoofing4From
 
'DoNoFrom' will detect this from header as invalid 

btw: not only assp detects this mistake (if configured) 

X-Spam-Status: No, score=3.812 tagged_above=-10 
            tests=[FROM_EXCESS_BASE64=0.105, FROM_NO_USER=2.599, 
            HELO_MISC_IP=0.001, HTML_MESSAGE=0.001, 
MIME_BASE64_TEXT=0.001, 
            MIME_HTML_ONLY=1.105] autolearn=disabled 

spamassassin also 

Thomas





Von:        Brunner Markus <[email protected]> 
An:        For Users of ASSP <[email protected]> 
Datum:        31.05.2017 16:22 
Betreff:        Re: [Assp-user] DoNoSpoofing4From 




Hi, 
  
this is the full header. 
  
Received: from mail.starrag.com (10.152.1.40) by RO57anon.starrag.com 
(10.152.1.23) with Microsoft SMTP Server id 14.3.279.2; Wed, 10 May 2017 
21:27:36 +0200 
Received: from alz51.rev.netart.pl (ro37.starrag.com [10.254.1.223]) by 
mail.starrag.com (Postfix) with ESMTPS id 53717E00CF          for 
<[email protected]>; Wed, 10 May 2017 21:27:54 +0200 (CEST) 
X-Assp-ID: mail.starrag.com m1-44474-10908 
X-Assp-Session: F283A48 (mail 1) 
X-Assp-Intended-For: [email protected] 
X-Assp-Version: 2.5.5(16366) on mail.starrag.com 
X-Assp-Server-TLS: yes 
X-Assp-Delay: not delayed (gripvalue low: 0.29); 10 May 2017 
            21:27:54 +0200 
X-Assp-Received-SPF: none (cache) ip=85.128.182.51 
[email protected] 
            helo=alz51.rev.netart.pl 
X-Original-Authentication-Results: mail.starrag.com; spf=none 
X-Assp-Message-Score: 17 (DNSBL: neutral, 85.128.182.51 listed in 
            l2.apews.org) 
X-Assp-IP-Score: 17 (DNSBL: neutral, 85.128.182.51 listed in 
            l2.apews.org) 
X-Assp-DNSBL: neutral, 85.128.182.51 listed in (l2.apews.org<-127.0.0.2; ) 

X-Assp-Spam-Level: **** 
Received: from alz51.rev.netart.pl ([85.128.182.51] 
helo=alz51.rev.netart.pl) 
            by mail.starrag.com with SMTP (2.5.5); 10 May 2017 21:27:54 
+0200 
X-Virus-Scanned: by amavisd-new using ClamAV (14) 
X-Spam-Flag: NO 
X-Spam-Score: 3.812 
X-Spam-Level: *** 
X-Spam-Status: No, score=3.812 tagged_above=-10 
            tests=[FROM_EXCESS_BASE64=0.105, FROM_NO_USER=2.599, 
            HELO_MISC_IP=0.001, HTML_MESSAGE=0.001, 
MIME_BASE64_TEXT=0.001, 
            MIME_HTML_ONLY=1.105] autolearn=disabled 
Received: from [10.0.0.38] (remote.dse-ltd.co.uk [81.133.147.22]) by 
goreckizory.nazwa.pl (Postfix) with ESMTP id E2A9737FEEB   for 
<[email protected]>; Wed, 10 May 2017 21:27:34 +0200 (CEST) 
Date: Wed, 10 May 2017 20:27:30 +0000 
From: =?UTF-8?B?Sm9obi5Sb2JiaW5zQHN0YXJyYWcuY29t?= 
Message-ID: <[email protected]> 
To: <[email protected]> 
Subject: =?UTF-8?B?SW52b2ljZSA4MTY4NzYyNDE5NSBDcmlzdCBMZWFo?= 
MIME-Version: 1.0 
Content-Type: multipart/mixed; 
            boundary="_c10740b4-96ca-4ccf-89ab-02bf68b8d5c3_" 
Return-Path: <> 
X-MS-Exchange-Organization-AuthSource: RO57.starrag.com 
X-MS-Exchange-Organization-AuthAs: Internal 
X-MS-Exchange-Organization-AuthMechanism: 10 
  
How can mails like this be blocked? 
  
Best Regards 
Markus 
  
  
  
Von: Thomas Eckardt [mailto:[email protected]] 
Gesendet: Mittwoch, 31. Mai 2017 13:49
An: For Users of ASSP <[email protected]>
Betreff: Re: [Assp-user] DoNoSpoofing4From 
  
this header is invalid - so there is nothing to recognize 

From: =?UTF-8?B?U2NoZXJyZXIgS2V2aW4=?= <[email protected]> 

would be the valid variant 
 
a from header has to contain a valid email address - if this is provided, 
it will be used by assp 

Thomas





Von:        Brunner Markus <[email protected]> 
An:        "[email protected]" <
[email protected]> 
Datum:        31.05.2017 13:11 
Betreff:        [Assp-user] DoNoSpoofing4From 





Hi, 
 
is there a way that assp recognize UTF8/b64 encoded “from” header for 
spoofing? 
 
Header looks like: 
From: =?UTF-8?B?U2NoZXJyZXIgS2V2aW4=?= 
 
Freundliche Grüsse / Kind regards 

Markus Brunner 
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This email and any files transmitted with it may be confidential, legally 
privileged and protected in law and are intended solely for the use of the 

individual to whom it is addressed.
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