Fwd: The Spamhaus CSS list

Julian Field MailScanner at ecs.soton.ac.uk
Fri Oct 2 15:38:28 IST 2009

Here is one you might all be interested in (with thanks to Tony Finch):

Spamhaus have announced a new blacklist aimed specifically at showshoe
spammers. "Snowshoe" is a technique where spammers use large numbers of
superficially legitimate hosts that each send a small quantitiy of spam,
in an attempt to spread the spam load and keep each host below the radar.

The new CSS list is a component of the SBL (and therefore also the sbl-xbl
and ZEN lists) so many setups will use it automatically.


However note that SpamAssassin will not, since its current rules do not
recognise a result from the ZEN blacklist. You can add the
following to your local.cf to treat CSS matches as equivalent to other SBL

header RCVD_IN_SBL eval:check_rbl_sub('zen', '127.0.0.[23]')

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