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March 10, 2005, 10:43 pm
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Re: Bouncing Seems to Work
Passive filtering is okay as your solution does not inflict anyone else
the the negative effects of your solution. Reactive filtering (i.e.,
bogus bounces) is wrong simply because there is no intelligence employed
in routing your bounce so it targets the real sender. The From,
Reply-To, and other headers are bogus when the e-mail originates from a
spammer, so obviously using those headers to route your bounce messages
mean that you never hit the spammer and instead bombard innocents with
In fact, once a Mailwasher is known that uses automatic bouncing, a
spammer or malcontent can actually abuse your mailbox and irritate lots
of innocents to the point that they must report you to get your account
killed to stop the bombardment of your turds that you fling at them. A
simple case is that a spammer enters email@example.com,
firstname.lastname@example.org, or some other defined and common e-mail management
account at your ISP or e-mail provider. They send you thousands of
e-mails that are guaranteed to have Mailwasher trigger on them as spam.
Your Mailwasher then sends out thousands of NDRs (non-delivery reports)
to the admin for your ISP or e-mail service. Their mailbox gets filled
with all your bogus NDRs. You don't think they'll take action against
you for spewing out thousands of bogus NDRs, especially if it is a
violation of the Terms of Service, all of which are themselves spam
because they were unsolicited responses to e-mails never sent by that
admin. So the spammer makes you blast someone else with all your "spam
bounces" who definitely has the power to kill your account. You become
such an irritant to one recipient receiving thousands of your bogus
NDRs, or from thousands of innocents reporting your spam which gets your
domain to get blacklisted, that your ISP has no choice but to kill your
Spewing out bounces without any intelligent routing of them so they are
misdirected at innocents is an irresponsible solution. Just configure
Mailwasher to delete them.
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