Thank you Thomas,

I did not realize that it used the /s regex switch - that make sense. I will need to go edit all of my BombRE's.

Your suggestion did work:

(?:^|\n)from:\s*_+

However, if you add scoring to it:

(?:^|\n)from:\s*_+=>1.5

ASSP rejects it as invalid Regex.

On 6/9/2022 5:05, Thomas Eckardt wrote:
I know regex fairly well

hmm.....


from\:.*\_

looks very bad - it is read like:

look for
from:
followed by anything any long (or nothing)
followed by
_

in the complete header
keep in mind: all bombRE's are using the /s regex switch (ignoring CR and LF)

So, if there is an *underscore* anywhere after *from:* in the mail header, the regex will match:

use

(?:^|\n)from:\s*_+

instead (collon and underscore don't need to be escaped here . but can be)

is read like:

look for
at the start or after each newline
from:
followed by any count of CR,LF,SPACE,TAB (or nothing)
followed by any count (but at least one) of
_

in the complete header

in your bombHeaderRe the line should be:

~(?:^|\n)from:\s*_+~=>60

the tilds are required in assp because of the used pipe (|) in the regex


Thomas




Von: "Scott MacLean" <a...@hollsco.com>
An: "K Post" <nntp.p...@gmail.com>, "ASSP Development Mailing List" <assp-test@lists.sourceforge.net>
Datum: 07.06.2022 19:22
Betreff: Re: [Assp-test] bombHeaderRe matching every email
------------------------------------------------------------------------



No, I did not. I know regex fairly well, and this to me looks like a bug
or otherwise unintentional operation. I've commented out these lines in
my BombHeader for now.

On 6/7/2022 10:58, K Post wrote:
Hi Scott,
Did you ever figure this out?
I'm no regex wiz like Thomas is, but what you have appears pretty  simple
to me -- and I don't see anything wrong with it...
I tried

    from\:.*\_

in testRE and see it matching everything too.  I don't understand  why.
I know this doesn't help you with why this is happening, but figured
that it would at least help to hear that you're not the only one whose
system generates that result.



On Wed, Jun 1, 2022 at 5:32 PM Scott MacLean <a...@hollsco.com
<mailto:a...@hollsco.com <mailto:a...@hollsco.com>>> wrote:

    I've been seeing a bunch of spam getting through my  filter recently,
    and
    they all have the same thing in common: an underscore  at the beginning
    of the "From" and/or "Subject" lines.  This should be really easy to
    pick
    up with bombHeaderRe, but something's not working.

    Here's an example of the spam I'm seeing:

    From:_Male Health
    <support-team_0rk47mtncmz9bfpalcklzzn...@offer.market.ca
    <mailto:support-team_0rk47mtncmz9bfpalcklzzn...@offer.market.ca
<mailto:support-team_0rk47mtncmz9bfpalcklzzn...@offer.market.ca>>>
    Subject:_Size matters and we can help

    Sometimes there is a space in between the colon and  the underscore,
    usually there is not.

    Here is the regex I added to my bombHeaderRe:

    From\:.*\_=>60
    Subject\:.*\_=>60

    However, I quickly realized that this was tagging EVERY  email coming
    through the server! For instance, here's an email:

    From: Readly <rea...@news.readly.com <mailto:rea...@news.readly.com 
<mailto:rea...@news.readly.com>>>

    And looking at mail analysis, it's being caught by this  regex, even
    though there is no underscore:

    BombHeader RE: 'highest match: "(matchlength:84)  From: Readly
    <readly@news.readly" with valence: 60 - PB value  = 60'
    matching bombHeaderRe(file:files/bombheaderre.txt 
<file://files/bombheaderre.txt>[line 188]):
    'From\:.*_'

    Any idea what's going wrong and causing this?




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