[plug] Blacklisted mail server?

[Ben Jensz]

Spam and virus infected email certainly do take up far more than their 
fair share of email traversing the email systems at my work.  Something 
simple like a new variant of a virus can make a substantial difference 
to mail flow.. the most notable example of this I've seen was Sober.Z in 
November last year.  The amount of crap email that was being sent around 
immediately after that started running riot was obscene.

What's rather alarming is that there is an increasing amount of spam 
originating from very substantial bot nets of compromised systems (more 
than likely Windows systems).  One bot net that I watched one day had in 
excess of 1000 compromised hosts on it all attempting to send the same 
spam email to a multitude of recipients - all of it being rejected, but 
nonetheless, that's a very substantial array of compromised systems 
under the control of just one spammer attempting to send a particular 
spam message to recipients.


/ Ben


Adrian Woodley wrote:
> A further, scarier stat; after quick calculation (again, from 1 out of 8 mail filter servers), 34% of email sent from our customers is spam or virus (and is dropped by our filters). Hasn't Windows been great for the Internet!
>
> Adrian
>
>   
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