From: John Summerfield <summer(_at_)OS2(_dot_)ami(_dot_)com(_dot_)au>
[dman wrote:]
The Message-ID: header, though, often can have legit `$' chars in it.
I wanted to exclude that header. The following may or may not be
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
:0 i # two+ `!' or `$' symbols in headers . . .
[# irrelevant condition snipped to avoid ambiguity]
* -175^0
* 100^1 [$!]
* -100^1 ^Message-ID:.*[$!]
{ do some other things if we're here }
[snip]
Filtering on chars in message-id seems to me fraught with the risk of
mis-identifying legit mail as spam.
Er, yes (nominally, here), which is why I expected this recipe to
filter on all *other* recipes but back out any unwanted matching
coming from Message-ID:.
However, fwiw, in some other recipes from my spamsnag sections, I
do quite useful Message-ID: filtering, and those recipes are some
of the most dependable in the anti-spam arsenal I have crafted.
I've been studying what spammers do to Message-ID:'s for months.
--
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