And from this I'm interpreting:
If we block mail from the IP blocks (or all IPs from offending ISPs),
then there customers will eventually get fed up with them and change
ISPs.

Well, Len, this is the real world.  And in this real world, those
customers of the offending ISPs don't blame the ISPs...they blame the
receiving mail server...us!  These customers are educated by the ISPs to
blame the "other guy"...us!

It's all about the money.  If they tell the truth, then those customers
will force them to shut down spammers, but the spammers pay them money,
too.  A lot of money evidently, as I get spam from thousands of AOL, RR,
earthlink, adelphia, etc accounts.  Anyone see the conflict of interest
here??  This is why the largest ISPs are on the top of the offending
list, and why they are bullies to everyone else.

Todd Holt
Xidix Technologies, Inc
Las Vegas, NV USA
702.319.4349
www.xidix.com
 

-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Len Conrad
Sent: Friday, February 13, 2004 10:45 AM
To: [EMAIL PROTECTED]
Subject: RE: [IMail Forum] Error 554?

[This email took a suspicious route to arrive here; Suspected SPAM (4)]


>>Is this becoming common practice to just deny entire IP address blocks

>>due to listings on spam databases?

Sure, if your MXs statistics show that 5 or 10 addresses from a Class C
are 
abusing you, then you have every right to block the entire Class C.

The network operator responsible for the Class is not policing his
network, 
so your concluding that other IPs in that Class will sooner or later
also 
be spamming you is valid.

A good analogy is that the network operator is operating a factory that
is 
spewig crap that is polluting your air, so you boycott all that
factory's 
products.

This is the logic behind blocking "subscriber" networks by PTR hostname
and 
by HELO hostname.  Your MX is receiving 10's of 1000's of spams from 
charter/att/comcast/rr/telus/pacbell/sbd/etc/etc/etc networks, for 
every  handful, if any, of valid msgs, so you block all those subscriber

networks until those multi-$$billion network factories, which huge,
highly 
competent, highly paid IT staffs, stop polluting your email environment.

Len


_____________________________________________________________________
http://MenAndMice.com/DNS-training : Chicago; Wash DC; Atlanta
http://IMGate.MEIway.com : free anti-spam gateway, runs on 1000's of
sites


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