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Re: mail "spamlists" again:cbl.abuseat.org

On Tue, Jun 06, 2006 at 04:26:31PM -0300, Djalma Fadel Junior wrote:
> On Tue, 06 Jun 2006 14:45:42 -0400
> Peter Dumpert <pdumpert@innovativebusiness.net> wrote:
> > I had the same experience with the spamhaus list twice. Both times it 
> > was legitimate - a client's pc got infected with a virus and was spewing 
> > out spam. Once you fix the problem it is fairly easy to get off the 
> > list. There is a form on their site - http://cbl.abuseat.org/
> but, how could a ISP keep control under its users computers?
> Is there a way to drop these viruses traffic for outgoing?

The smarthost is getting listed for relaying the spam.  While I am
not suggesting this is trivially easy or without cost, the smarthost
can do all the relevant antispam and antivirus checks on emails it
is being asked to relay out, just as oncoming mail servers do for
mails going out.  In fact it should be easier than for incoming
since the outgoing email rate should be much lower.

The ISP could also investigate rate-limiting for its own customers.


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