94 lines
4.6 KiB
Plaintext
94 lines
4.6 KiB
Plaintext
From spamassassin-talk-admin@lists.sourceforge.net Thu Sep 12 21:09:40 2002
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User-Agent: Microsoft-Outlook-Express-Macintosh-Edition/5.02.2106
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Date: Thu, 12 Sep 2002 20:50:28 +0200
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Subject: Re: [SAtalk] Reject, Blackhole, or Fake No-User
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From: Fred Inklaar <opslag@inklaar.net>
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To: SpamAssassin <spamassassin-talk@example.sourceforge.net>
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Message-Id: <B9A6AE92.91AD%opslag@inklaar.net>
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tests=AWL,INVALID_MSGID,IN_REP_TO,KNOWN_MAILING_LIST,
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QUOTED_EMAIL_TEXT,SPAM_PHRASE_02_03,USER_AGENT
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version=2.50-cvs
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X-Spam-Level:
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Op 12-09-2002 00:35 schreef Ellen Clary (ellen@dgi.com):
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>> Then there is a third possibility. Instead of returning a 550 code
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>> indicating you're on to the spammer, fake a 5.1.1 response which is
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>> saying "mailbox does not exist." This would be in the hopes that some
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>> spammers out there actually remove names reported as non-existent from
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>> their lists. I know, a slim hope, but even if only a few do, it can
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>> lower the incidence.
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>
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> They don't, I can guarantee that. Quite a few spamtraps nowadays
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> operate by 5nn'ing for 6 months in the hope of getting legit mailers
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> to remove bouncing addrs from lists; then after 6 months, they just
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> spamtrap all incoming mail to those addrs. (unfortunately a lot of
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> legit mailers don't bother cleaning their lists either.)
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Most spammers don't check reply codes at all, they just send out as many
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mails as their system will hold without checking for any confirmation.
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A trick to lower spam reception was dicussed on the postfix mailing list
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some time ago: answer all incoming mail with a 4xx temporary error code when
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it is offered the first time, and accept it the second time. Apparently most
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mass-emailers don't even try to deliver a second time.
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-------------------------------------------------------
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This sf.net email is sponsored by:ThinkGeek
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Welcome to geek heaven.
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http://thinkgeek.com/sf
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_______________________________________________
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Spamassassin-talk mailing list
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Spamassassin-talk@lists.sourceforge.net
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https://lists.sourceforge.net/lists/listinfo/spamassassin-talk
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