Re: [9fans] need help with improving my spam filtering

["Steve Simon" <steve@quintile.net>]

I have had quite a bit of success with greylisting, however in the
last 3 or 4 months it has become less effective.

The vast majority of soam I get these days is from spam virus infected
machines on DSL lines in the USA (sorry but it true).

I was coinsidering adding features to smtpd and ratfs to allow regexes
so I could add rules for DSL lines. Most ISPs seem to use a fixed format for
the reverse IP addresses for their DSL accounts - though each ISP has its
own unique format.

There is also some work being done on an SPF validator at present but I
will let them announce it as they see fit.

-Steve

PS: I have resurected Boyds script dws (Die Worthless Spammer) to send a
complaint thought most ISPs seem to ignore them, but I feel I should try.