How the spammers find you
Posted Apr 18, 2003 13:06 UTC (Fri) by
hansl (subscriber, #5086)
In reply to:
How the spammers find you by cpeterso
Parent article:
How the spammers find you
I should have mentioned that besides the blacklist we also maintain a
whitelist where most mailservers are listed now from which we have
received one or more legitimate emails.
I agree that this is a forceful method, but since the introduction of
DNS blacklists a couple of years ago spammers have not been sitting
still, and are moving towards the use of dial-up networks on which they
try to plant trojans and virii that will act as spam injectors.
Blocking dial-up networks is not too agressive in my opinion, since you
can expect ISP's to provide an MTA to their customers (that usually sits
outside their dial-up range). You can trust most ISP's mailservers like
AOL's a lot better than Joe User's PC running LookOut. And I've found
that when it happens that an ISP's mailserver does get blacklisted, they're
usually very fast at correcting the situation. They have an incentive to do
so, because it being blocked makes a lot of customers unhappy...
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