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users behind dynamic IP, lower or remove DUL test default score
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From: Mathieu Roy <[EMAIL PROTECTED]>
To: Debian Bug Tracking System <[EMAIL PROTECTED]>
Subject: spamassassin: please do not criminalise end users, users behind 
dynamic IP,
 lower or remove DUL test default score
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Date: Fri, 14 Jan 2005 16:54:08 +0100
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Package: spamassassin
Version: 3.0.2-1
Severity: normal

With spamassassin 3.0.0, I got such result:


 0.1 RCVD_IN_SORBS_DUL      RBL: Envoy� directement depuis une adresse IP 
dynamique
                            [151.24.72.136 listed in dnsbl.sorbs.net]
 1.7 RCVD_IN_NJABL_DUL      RBL: NJABL: Envoy� depuis une adresse IP dynamique
                            [151.24.72.136 listed in combined.njabl.org]


While it was effectively a spam caught, DUL/Dynamic IP scoring (1.7) is quite 
problematic. 
        
        - The score increase with each DNSbl you use, even if they use the
        exact same source
        - Why the hell freedom to run a server should not be given to someone
        behind dynamic IP? Restricting users freedom is a very sensitive issue,
        I do not think software shipped by Debian by default should 
        criminalize dynamic IP users by assuming they are guilty of something.

So, would it be possible to have the DUL test deactivated by default, or with a 
score less important (0.1 is fine)? It is good that a piece of software like 
spamassassin get distributed widely. Spam will be less and less commercially 
interesting. But it should not cost end users freedom to run a server, don't 
you agree?

People that run DUL DNSbl warn users about DUL list usage. The problem here is 
that someone may filter DUL users without even noticing it, just like if it 
were an absolutely reliable anti-spam criterion.

Regards,



-- System Information:
Debian Release: 3.1
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: i386 (i686)
Kernel: Linux 2.6.8-1-686
Locale: LANG=fr_FR, LC_CTYPE=fr_FR (charmap=ISO-8859-1)

Versions of packages spamassassin depends on:
ii  debconf                       1.4.30.11  Debian configuration management sy
ii  libdigest-sha1-perl           2.10-1     NIST SHA-1 message digest algorith
ii  libhtml-parser-perl           3.36-1     A collection of modules that parse
ii  perl [libstorable-perl]       5.8.4-5    Larry Wall's Practical Extraction 
ii  spamc                         3.0.2-1    Client for SpamAssassin spam filte

-- debconf information:
  spamassassin/upgrade/2.40:
  spamassassin/upgrade/2.40w:
  spamassassin/upgrade/cancel: Continue
  spamassassin/upgrade/2.42m: No
  spamassassin/upgrade/2.42u: No

---------------------------------------
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Date: Fri, 14 Jan 2005 13:45:34 -0500
From: Duncan Findlay <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Subject: Re: Bug#290520: spamassassin: please do not criminalise end users, 
users behind dynamic IP, lower or remove DUL test default score
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On Fri, Jan 14, 2005 at 04:54:08PM +0100, Mathieu Roy wrote:
> While it was effectively a spam caught, DUL/Dynamic IP scoring (1.7) is q=
uite problematic.=20
> =09
>       - The score increase with each DNSbl you use, even if they use the
>       exact same source

Yep, but that was taken into account by the scoring mechanism.

>       - Why the hell freedom to run a server should not be given to someone
>       behind dynamic IP? Restricting users freedom is a very sensitive issue,
>       I do not think software shipped by Debian by default should=20
>       criminalize dynamic IP users by assuming they are guilty of something.

People with dynamic IPs are free to run servers. However, it has
proven to be a spam sign. What users SHOULD do, is run their own
server, but route their mail through their ISP's SMTP server. (exim
smarthost)

> So, would it be possible to have the DUL test deactivated by
> default, or with a score less important (0.1 is fine)? It is good
> that a piece of software like spamassassin get distributed
> widely. Spam will be less and less commercially interesting. But it
> should not cost end users freedom to run a server, don't you agree?

See above.

> People that run DUL DNSbl warn users about DUL list usage. The
> problem here is that someone may filter DUL users without even
> noticing it, just like if it were an absolutely reliable anti-spam
> criterion.

It is not enough to make a non-spam message scored as such. (with
default threshold)

--=20
Duncan Findlay

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