Re: Reverse dns checking for local machine

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Author: Dr. Rich Artym
Date:  
To: exim-users
Subject: Re: Reverse dns checking for local machine
In message <E0x7oVO-00050X-00@???>, John Bolding writes:

> Using exim, We __the customer__ **have** blocked about 90% of incoming SPAM.
> Idiotic or not, its nice to deal with only 10 pieces of SPAM, not 100.


Excellent. __As a customer__, it's precisely right that you should be
able to do so, since only you can decide what you want or don't want.
But the ISP has no possibility of knowing what you think unless you
tell it exactly what blocking rules you want, and that specification
will be different for each individual, ranging from "Don't dare delete
anything addressed to me or I'll sue" to "Do what you like, I don't
mind the possibility of losing something that I might have wanted."

> (In the last few days alone, we have blocked in excess of 300 SPAMs --


"We"????? I thought you were talking as the customer? If you're
talking as an ISP now then you have exceeded the mandate that your
customers have given you by deleting items addressed to them without
their individual authorization. I hope they sue. :-)

> we are deeply indebted to Sir Hazel for the tools that allow this major
> savings of time and corporate resources.


Hmmm, Philip has said before that he is in the business of producing
a highly configurable MTA that can implement all common policies,
without tying himself to any particular camp, and we all express
our thanks to him often. Let's not burden him though with any sense
of responsibility for our own individually chosen policies. I call
deleting customer mail on any basis other than individual customer
choice blatant censorship, but I don't blame Philip for what you do.

Quite the opposite: Exim's per-customer filters allow individual
customization of spam deletion by conditional use of "seen finish",
so Philip has already provided us with the means of placing choice
of deletion policy in the hands of the customer. The rest is up to
us, eg. we need to create CGIs that make it easy for customers to
tailor their private email filtering through the web. We certainly
can't complain that it's the MTA's inflexibility that is forcing us
to ignore customer choice and to implement global filtering.

> Not only do they have to recieve it, they have to read it to determine
> if its SPAM so they can do "what the customer" requests.
>
> Now, THAT'S scary.


Huh? Why is # Exim filter scary?

Rich.
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