Whitelisting logged in user
rabellino at DI.UNITO.IT
Wed Aug 24 15:01:40 IST 2005
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Ugo Bellavance wrote:
>Nigel kendrick wrote:
>>One of our users is currently on a dial-up link and it looks like the
>>dial-up IP block has been blacklisted so their mail is being deleted due to
>>"Spam Lists To Be Spam = 3". I get the feeling a ruleset that ups the
>>threshold to, say, 5 would be a workaround, but it would not be watertight.
>>Users have to authenticate before sending - can this be worked into a
>>ruleset? I'm not sure where to start with this one so any pointers would be
>Maybe implementing SMTP-AUTH at mta level?
Using in sendmail the TSL+AUTH, you get into your headers a string like this
(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO userCertificateDN= DipinfoAuthUser=YOURUSER );
Then I've inserted into spamassassin this rule:
header AUTHENTICATEDUSER Received =~ /(.*)DipinfoAuthUser=\w(.*)/
describe AUTHENTICATEDUSER Email Sender Auth by MY MTA
score AUTHENTICATEDUSER -100.0
Where DipinfoAuthUser was choosed by me as a search token.
Now, the problem is that (As far as I know) the blacklists wins against
a SA score, even if negative score, so now i've disabled the blacklist
There's a way to understand the behaviour if blacklist and SA checks are
in contrast by themself ???
Dott. Mag. Sergio Rabellino
Department of Computer Science
University of Torino (Italy)
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