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Roger Thomas escreveu:
> I am *very* curious on how those spammers do their job. I mean
You are not alone. :)
> - how do they detect that a server is an open relay ?
Hmmm, they guess? They scan the networks? They use
footprint patterns? They have very good spies? :)
Probably what they do is crawl the web for e-mail
address and try to connect to the domains to get open relay
servers, IMHO, they probably do that on the same network of
a compromised or weak server.
> - once they have detected, what they used to relay their
> msgs? Command line? tools?
In Brazil we got some spammers using modified versions
of MTAs (so far qmail and sendmail), but you can use just a
part of the SMTP protocol, just to open the connection and do
the delivery, for sure there are tools, that try to workaround
throttle and other anti-spam techniques.
> I would like to test my servers against those techniques/tools
> if possible. Please advise.
Hope it helps. :)
- --
//////////
// Felipe Augusto van de Wiel <[EMAIL PROTECTED]>
// CTI/Suporte - SEDU/PARANACIDADE
// http://www.paranacidade.org.br/
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