Ok this is an interesting followup. Since I *know* that the gr_domain.cf
file is being read (I needed to change the '15' scores in there to 1.5 to
have a shot at receiving mail from providers like Mailchimp and Constant
Contact) I added the

score HTML_FONT_LOW_CONTRAST 10

To *that* file, recompiled rules, and restarted spamd and voila, it is now
scored at 10 rather the 0.1

And per other comments here a number of senders do the low contrast thing
so what I *really* want are the ones where it is practically *no* contrast,
is COLORx / (COLORx+1) LSB in one of the colors. (looking at source pages i
see background #ffffff and text #fffffe for example.

That suggests that local.cf is either not being read, or something comes
along and sets the parameters after it sets them? I note that gr_domain
comes lexically *before* local.cf so that is kind of confusing to me.

--Chuck


On Mon, Oct 8, 2018 at 11:19 AM John Hardin <jhar...@impsec.org> wrote:

> On Mon, 8 Oct 2018, Chuck McManis wrote:
>
> > Hi,
> >
> > I restart spamd everytime I change local.cf and unfortunately John
> changing
> > the value as you've suggested and as I mentioned I had already tried,
> > doesn't actually change the score it assigns. Still trying to figure this
> > out.
>
> ...whoops, I didn't catch that, sorry...
>
> SA supports multiple config files, they are parsed in
> sorted-by-filename-order. Are there multiple .cf files in your local
> config folder and is the score for that rule being set in one that sorts
> after the one you're editing?
>
> Also: if the score was zero it would be suppressed entirely. The score is
> probably 0.001 (advisory).
>
> The base scores are:
>
>     score HTML_FONT_LOW_CONTRAST 0.713 0.001 0.786 0.001
>
> ...so depending on your config that score may be coming from base, and
> your local changes *should* be overriding it.
>
> And - silly question - are you *sure* you're editing the *correct* local
> config file?
>
>
> > --Chuck
> >
> > On Mon, Oct 8, 2018 at 8:33 AM Kevin A. McGrail <kmcgr...@apache.org>
> wrote:
> >
> >> I think he might also need to restart spamd/amavisd/whatever to have the
> >> local.cf change take place.
> >> --
> >> Kevin A. McGrail
> >> VP Fundraising, Apache Software Foundation
> >> Chair Emeritus Apache SpamAssassin Project
> >> https://www.linkedin.com/in/kmcgrail - 703.798.0171
> >>
> >>
> >> On Mon, Oct 8, 2018 at 11:18 AM John Hardin <jhar...@impsec.org> wrote:
> >>
> >>> On Mon, 8 Oct 2018, Chuck McManis wrote:
> >>>
> >>>> I have been trying to tune scores to achieve better matches with spam
> >>> that
> >>>> is getting through. And one test which shows up is
> >>> HTML_FONT_LOW_CONTRAST
> >>>> which is being scored for 0. Doing a scan of my incoming mail flow
> this
> >>> is
> >>>> a huge signal, perhaps even a disqualifying one as I have yet to find
> a
> >>>> legitimate piece of email where this is true and it isn't spam.
> >>>>
> >>>> So in my local.cf file I added:
> >>>>
> >>>> score HTML_FONT_LOW_CONTRAST 10
> >>>>
> >>>> To have it add 10 points to the spam score, recompiled rules and
> >>> restarted
> >>>> spamd. Yet it still gives it 0 points.
> >>>>
> >>>> 0.0 HTML_FONT_LOW_CONTRAST BODY: HTML font color similar or identical
> to
> >>>>                            background
> >>>>
> >>>> How do I change this value?
> >>>
> >>> In your local config file:
> >>>
> >>>    score   HTML_FONT_LOW_CONTRAST   1.000   # or whatever score you
> prefer
> >>>
> >>>
> >>> The reason it scores so low in the base ruleset is the S/O is *very*
> low
> >>> in the masscheck corpora - 0.114 - 4% spam hits vs. 31% ham hits.
> >>>
> >>> You might want to be careful if you intend to treat that as a poison
> pill
> >>> by itself...
> >>>
> >>> I'll take a look at whether its performance can be improved.
> >>>
> >>> --
> >>>   John Hardin KA7OHZ
> http://www.impsec.org/~jhardin/
> >>>   jhar...@impsec.org    FALaholic #11174     pgpk -a
> jhar...@impsec.org
> >>>   key: 0xB8732E79 -- 2D8C 34F4 6411 F507 136C  AF76 D822 E6E6 B873 2E79
> >>> -----------------------------------------------------------------------
> >>>    Politicians never accuse you of "greed" for wanting other people's
> >>>    money, only for wanting to keep your own money.    -- Joseph Sobran
> >>> -----------------------------------------------------------------------
> >>>   557 days since the first commercial re-flight of an orbital booster
> >>> (SpaceX)
> >>>
> >>
> >
>
> --
>   John Hardin KA7OHZ                    http://www.impsec.org/~jhardin/
>   jhar...@impsec.org    FALaholic #11174     pgpk -a jhar...@impsec.org
>   key: 0xB8732E79 -- 2D8C 34F4 6411 F507 136C  AF76 D822 E6E6 B873 2E79
> -----------------------------------------------------------------------
>    The call to let 16-year-olds vote is a call to amplify the votes
>    of teachers' unions. If you think political indoctrination in the
>    schools is bad now, wait until it has the direct power to tip
>    election results.                               -- Robert Tracinski
> -----------------------------------------------------------------------
>   557 days since the first commercial re-flight of an orbital booster
> (SpaceX)
>

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