DCC clients changing Subject header survey

Michael Ghens michael@spconnect.com
Thu Sep 26 17:26:53 UTC 2002

Personally, I think that this should be left to something like procmail

would be better for this job:

SUBJ=`formail -zx Subject:` 

:0 fW
| dccproc  -w whiteclnt -c CMN,10

:0 e
|formail -I"Subject: [SPAM] ${SUBJ}"

On Thu, 26 Sep 2002, Vernon Schryver wrote:

> Date: Thu, 26 Sep 2002 09:47:37 -0600 (MDT)
> From: Vernon Schryver <vjs@calcite.rhyolite.com>
> To: craig@deersoft.com
> Cc: dcc@calcite.rhyolite.com
> Subject: Re: DCC clients changing Subject header survey
> > From: Craig Hughes <craig@deersoft.com>
> > SpamAssassin just prefixes the subject (with *****SPAM*****, or a 
> > user-configurable string), and that seems to work for just about 
> > everyone.  Pretty much all MUAs which provide any rules functionality 
> > at all will allow you to search for a particular word or string within 
> > the subject line, or at the very least beginning the subject line.
> So are you recommending that I add an option to add a prefix to
> the Subject line?  I guess such an option might as well take a
> string instead of be a boolean.  The biggest problem is finding an
> unused option character for common to dccm and dccproc.
> By the way, it would be cool if
>   - SpamAssassin could invoke `dccproc` with "-t many" if the score of
>    everything else is higher than some (existing?) threshold.  That
>    could significantly improve the effectiveness of SpamAssassin+DCC
>    particularly when using a private DCC server.  It would let users
>    share determinations of spamishness.
>   - the SpamAssassin instructions could recommend looking for an
>    "X-DCC-.*-Metrics:.*bulk" header instead of running dccproc in
>     configurations where the header is present.  This matters because
>     while running dccproc is not too slow, every bit helps.
> How fast is SpamAssassin?  I was told yesterday that checking a message
> with SpamAssassin needs 1 or a small number of seconds.  Is that true?
> It is consistent with something I've observed on a couple of the public
> DCC servers named by dcc.dcc-servers.net.  There are 86400 seconds in
> a day, and none of the clients using the DCC servers with SpamAssassin
> are handling more than 40,000 or 50,000 mail messages/day.  (Some
> outfits with the DCC wired to their MTAs and their own DCC servers
> are doing a lot more than 100K messags/day/MTA.)
> If that is speed is accurate, it might be best, when possible, for
> organziations to use the DCC in the MTA with fairly high bulk
> thresholds and then SpamAssassin for whacking the remaining spam.
> Vernon Schryver    vjs@rhyolite.com
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