I'm using nntp to read this newsgroup (through an academic server).
No spam at all.
-- Alain.
Which I think re-enforces the conclusion I have reached, and that is that
the most obnoxious spammer here is injecting his spam directly to a machine
handling google's groups that is downstream of any filtering they claim to
do. Short answer is to disconnect the the NNTP link and make this list
into a REAL mailing list. Subscribers only, or get past a GOOD captcha.
Spammers have stuff that can do the average captcha in a second or less, so
choose the images wisely and randomize both the background and the text.
Cheers, gene
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
The state of innocence contains the germs of all future sin.
-- Alexandre Arnoux, "Etudes et caprices"