Spammers hapless fate = ISP toil and sweat

On Thu 18 Sep, Keith C. Howell wrote:
> On 18 Sep 1997, Espen Vestre wrote:
> 
> > Luis Miguel Sequeira <lms at esoterica.pt> writes:
> > 
> > > I fail to understand from where these guys get Internet connectivity.
> > > It would violate almost any AUP I know of...
> > 
> > Unfortunately, some well-known ISPs, especially Psi.Net and UUNet, but 
> > several others also, continue to give these guys internet connectivity.
> > Customers of these providers are starting to discover that they
> > are losing mail connectivity, so let's hope the AUP-ignoring ISP's
> > will lose in the (not too) long run.
> 
> If someone could suggest how to identify a spammer *before* they start
> sending out email, then I am sure every person who has to deal with the
> spam would be most gratefull, it will save them alot of time and money.
> 
> When an ISP sells a connection to a company, they have no idea what the
> customer will use the connection for. Certainly, here at UUNET, our AUP is
> enforced. But if the spammer just buys another connection, how would we
> identify them? All the outside world will see is "another UUNET connected
> spammer", but to us, this is a separate customer.

One soluton that I aiming for (not implemented yet!) is tying our SMTP
server into our database.  When a customer connects, we look them
up in teh db based upon the MAIL FROM:<> value.  from the db is 
returned a max limit of RCPTs that the user may issue for a single
mail. New accounts can be given a value of 15 and incremented automatically
by say 10 each month as our trust of them develops.  If people want to
run mailing lists etc.. then they can phone/email us and we can manually
up the limit, after making appropriate checks first.

Biggest problem in this is ensureing people have legal MAIL FROMs


Regards,

aid


-- 
Adrian J Bool			| mailto:aid at u-net.net
Network Operations		| http://www.noc.u-net.net/
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