On Wednesday 22 October 2008 01:27:51 Terry Carmen wrote: > > Although it's frowned on by some, I've had much better success using a > combination of RBLs and RDNS pattern matching to reject spam. Since a > huge proportion of spam comes from zombie networks that are identified > by DHCP addresses, a dozen or so regular expressions like these will > block a ton of spam. > > smtpd_client_restrictions=reject_unknown_reverse_client_hostname . . . > > check_client_access=regexp:/etc/postfix/spam_ip_regex > > spam_ip_regex file: > > /[ax]dsl.*\..*\..*/i 450 AUTO_XDSL Email Rejected. You appear to be > connecting from a Dynamic IP address. > /client.*\..*\..*/i 450 AUTO_CLIENT Email Rejected. You appear to > be connecting from a Dynamic IP address. > /cable.*\..*\..*/i 450 AUTO_CABLE Email Rejected. You appear to be > connecting from a Dynamic IP address. > /dial.*\..*\..*/i 450 AUTO_DIAL Email Rejected. You appear to be > connecting from a Dynamic IP address. > This looks fairly useful. Does anyone else have any experience with this approach, who might be able to offer insight into whether it's valid or not?
-- Richard Foley Ciao - shorter than aufwiedersehen http://www.rfi.net/
