Re: Really good spam filtering (Bayesian)

From: Alan Connor (xxxxxx_at_xxxx.xxx)
Date: 07/30/03 

Date: Wed, 30 Jul 2003 00:46:40 GMT

On Tue, 29 Jul 2003 16:21:52 -0700, Ingo Pakleppa - ingo at kkeane dot com <me@privacy.net> wrote:
>
>
> On Tue, 29 Jul 2003 21:15:42 +0000, Vamp wrote:
>
>> In article <zDxVa.2083$Bg.454@newsread4.news.pas.earthlink.net>,
>> xxxxxx@xxxx.xxx says...
>>> Sure, a couple of people on Usenet have fired off mails to me (contents
>>> unknown) and been mortally offended by being asked to do something as
>>> onerous as resending that one mail, ONCE, to get on my pass list.
>>
>> I totally agree with this statement. Every time I say something positive
>> about challenge/response somebody gets up and screams about how awful
>> this system is. I think what is awful is all the spam I am getting. The
>> beauty of challenge response is that it is 100% accurate. You will get
>> absolutely no spam. You don't need to review the filtered email either.
>
> Two questions:
>
> - how do you handle mailing lists?
>

At or near the top of your .procmailrc just put:

:0:
* ^From.*address_that_sends_mailing_list_mail
mailbox_you_want_it_to_go_to

> - how do you handle do-not-reply email addresses, such as airline
> reservation confirmations, responses from tech support inquiries, etc.?
>

These addresses or domains need to be on your PASS list and you don't use
an auto-reply. Same recipe as above, in its simplest form.

> - how do you handle people who regularly change their email address? I,
> for one, do that. If you respond to the mangled email listed in my from
> address, when I then respond to you, it will be from yet another address
> which I never publish (I own the whole domain, so this is easy to do).
>

You can give them a password:

(remember, procmail runs every mail through each test, in order, and only
stops testing when the mail passes one and is delivered, unless you put a
c on the first line to make a carbon copy to send onward...)

Or use a recipe that allows them to mail you with their old address on the
Cc line.

:0:
From.*[[whoever@ehatever.whatever]]
* ! ^X-Loop: [[you@your.isp]]
inbox

:0:
* ^Cc: [[whoever@whatever.whatever]]
* ! ^Cc:.*@.*@
* ! ^X-Loop: [[you@your.isp]]
inbox

:0:
* ^Subject.*[[password]]
* ! ^X-Loop: [[you@your.isp]]
inbox

The brackets aren't part of the recipes, and the X-Loop stuff prevents mail-
loops and probably isn't necessay.

The second Cc line prevents spammers from getting through this way, by limit-
ing the entries to one.

Put notification about this stuff in your sig.

HTH

Alan 

-- 
      For Linux/Bash users: Eliminate spam with
      the Mailbox-Sentry-Program. See the thread
      MSP on comp.mail.misc for the scripts and docs.

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