Sorry - I forgot to say - 1) and 2) will break the BlockReporting - 
"resend" function (!!!) - because we will delete files randomly.

Thomas




K Post <nntp.p...@gmail.com> 
15.09.2009 04:19
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Thema
Re: [Assp-test] Antwort: Re: Antwort: Re: fixes and news in 2.0.1_RC0.4.12






I wish we could just use move2numb or straight number logging, but they 
want
us to review the found spam periodically, and that would just be 
impossible
if we couldn't use the subjects as a start...  Plus, move2numb would break
the block reporting.
Very good points on the fact that bayesian is last and that it'll never be
perfect.  Most of our catches are happening before that too, but the
bayesian filters are still catching a bunch.

We do not have a well developed bombre, nor the time to keep one updataed,
which is a big problem.  This is a for a charity, and there's just not the
resources.

As for duplicate messages not affecting the corpus, I agree, but with this
limitation of needing subject filenames, I can't think of another way of
limiting the number of messages in the file system other than randomly
deleting messages.  If I'm going to do that, might as well first get rid 
of
the duplicates to help keep the most diverse corpus, no?

We don't have the luxury of another filter on the real smtp server either.

We do get a lot of messages with the same subject.  The spammers will send
the same message to 100 or more users.  If it makes it to the collection
point of the code, we'll get the same message stored 100 times.  Our 
regexes
catch a lot, but there's plenty of times that an email with a subject like
"V__F_iGAra" will get past everything but bayesian filters.

Sure, there's a strong possibility of the same subject having a different
body, but deleting 98 of the 100 messages leaves room for 98 other 
messages
which will most likely be more diverse.

Since we definitely need to delete in some manner (which we want to be
random) and move2numb isn't an option, my plan is to edit the maintenance
functionality if subject logging is on and move2numb is off to:
1) First find messages with the same subject and delete all in excess of 3
then
2) calculate if we're over the maxfiles for each folder and then randomly
delete files based on the percent that we're over, in NO way based on file
date.
I've been doing this for 5 or so years with various 1.x installations, but
in a scheduled script, not in ASSP.

This change will honor the MaxBayesFileAge, MaxCorrectedDays and
maxNoBayesFileAge (you might want to make MaxCorrectDays use a naming
convention more consistent like MaxCorrectedFileAge).

Would you be intersted in this code?  Doesn't it make sense for people 
like
me who need to stick to subject logging?  Again, I'd much prefer an
alternative from an expert like yourself, that still affords the ability 
to
leave subject logging in place.


- it was my pleasure to help clean up the admin descriptions.  I intend to
do more as soon as there's a new version with the cleanup in place.

On Mon, Sep 14, 2009 at 1:37 PM, Thomas Eckardt/eck <
thomas.ecka...@thockar.com> wrote:

> >What method do you recommend using to keep the number of files down?
> Simply
> >deleting by age isn't going to cut it if you want a diverse corpus is 
it?
>
> The best way is:
>
> - do not use subject for filenames or use move2num
> - never delete any file by age
> - set maxfiles high enough to get a good corpus
>
> This is the way assp works for years. The new features are for special
> usage - for example: I do not use the bayes engine (only for testing the
> code). I have a very good spamdb, which is not changed for 2 years 
(doing
> some small scoring) - the meen way to detect spam is done by PB and
> IP-tests (mx,ptr,helo,FBMVT......). Because some mails bypassing (going
> other ways) assp, I use a bayes engine in Lotus Domino - just for fun -
> there are 1-5 messages blocked per week.  But I love to see the subject 
in
> Blockreports.
>
> And keep in mind - bayesian checks should be only a small part of spam
> detection - because the simple (???) mathematics is not  (could never 
be)
> perfect.
>
> Setting up the bomb regexes and all PB-valence values the right way, 
helps
> much more than the bayes check. It will take some time (and some work) 
to
> find out the best way (values) for you.
> I think, Fritz and I (and possible some others) - we have found that 
point
> - our ASSP detects 99.99% (or even more) spams. I have not seen a 
blocked
> good email for over one year.
>
> And at the end you have to weight - accept that from 200 users 10 are
> getting one spam per day (having 30.000 or more connections) - or
> analysing tonns of  mails and logs to get rid of the 10.
>
>
> >So what are your thoughts, Thomas, of my remove same subjects,
>
> same subject - same email  => ignored by assp, only one mail is 
processed
> in rebuildspamdb
>
> but
>
> same subject - different body ......  oh, the subject is only one part 
of
> the header (from to msg-id ip forwarder .............) - where is the
> end????
> Just a joke! This will help to reduce the number of mails (files) for a
> while, but not to increase the quality of the corpus (->spamdb) - what 
is
> more important for you?
> If you get tonns of spams with the same subject, do not use bayes to 
block
> them - use subjectRe or headerRe or blackRe or ........    .
>
> The bayesian check is one of the latest checks of assp - so try to 
detect
> spams before.
>
> Thank you for your help fixing the mistakes in config descriptions.
>
>
> Thomas
>
>
>
>
>
>
> K Post <nntp.p...@gmail.com>
> 14.09.2009 16:53
> Bitte antworten an
> ASSP development mailing list <assp-test@lists.sourceforge.net>
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>
> Thema
> Re: [Assp-test] Antwort: Re: fixes and news in 2.0.1_RC0.4.12
>
>
>
>
>
>
> Right, BUT if we're limiting the total number of files in the directory,
> wouldn't it be better to delete these duplicates to give a more diverse
> corpus?
>
> We can look at their subject name and then delete them.  This leave room
> for
> other files.
>
> Using subject logging and NOT move2numb, I guess I need some more
> clarification at this point.
>
> What method do you recommend using to keep the number of files down?
> Simply
> deleting by age isn't going to cut it if you want a diverse corpus is 
it?
>
> So what are your thoughts, Thomas, of my remove same subjects, remove
> really
> old by date, then remove a percentage (selecting randomly) based on the
> overage in each folder method?
>
>
>  Note: in the MaxBayesFileAge, you've got:
> Do not define this option, if you use the bayesian engine of ASSP.
> Deleting
> files because of there age, is wrong in this case!!!!! It should be 
"their
> age."  There's a bunch of other errors like this which I privately 
emailed
> to Fritz, on request.  Should I send you that email too?
>
>
> THANKS
>
> On Sun, Sep 13, 2009 at 2:00 AM, Thomas Eckardt/eck <
> thomas.ecka...@thockar.com> wrote:
>
> > >What do you think about deleting redundant corpus emails
> > >based on the subject?
> >
> > Redundant corpus emails are skipped/deleted based on there content 
(md5
> > hash).
> >
> > Thomas
> >
> >
> >
> >
> > K Post <nntp.p...@gmail.com>
> > 13.09.2009 03:28
> > Bitte antworten an
> > ASSP development mailing list <assp-test@lists.sourceforge.net>
> >
> >
> > An
> > ASSP development mailing list <assp-test@lists.sourceforge.net>
> > Kopie
> >
> > Thema
> > Re: [Assp-test] fixes and news in 2.0.1_RC0.4.12
> >
> >
> >
> >
> >
> >
> >  This is great, and thanks SO much for adding my idea of the max days
> for
> > corrected spam.  What do you think about deleting redundant corpus
> emails
> > based on the subject?
> >
> > On Sat, Sep 12, 2009 at 1:18 PM, Thomas Eckardt/eck <
> > thomas.ecka...@thockar.com> wrote:
> >
> > > Hi all,
> > >
> > > I'm back.
> > >
> > > fixed in 4.12:
> > >
> > > - for some messages the mail header was transfered two times
> > > - changing the display language was not working in any case
> > > - the hintbox in the config part of the GUI has shown wrong
> > > updated/changed values
> > >
> > > added in 4.12
> > >
> > > MaxCorrectedDays
> > > msg008590=Max Corrected File Age
> > > msg008591=This is the number of days a error report will be kept in
> the
> > > correctednotspam and correctedspam folders. These folders are the
> > longterm
> > > memory of ASSP, therefore the default is 1000 days.
> > >
> > > changed in 4.12:
> > >
> > > - the change language part is moved to the main config form !
> > >
> > >
> > >
> > > Thomas
> > >
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