Melvyn Sopacua a écrit : > On Thursday 13 August 2009 07:22:33 /dev/rob0 wrote: >> On Thursday 13 August 2009 06:17:37 Sahil Tandon wrote: >>> On Aug 13, 2009, at 6:28 AM, ram <r...@netcore.co.in> wrote: >>>> I use in smtpd_recipient restrictions >>>> reject_rbl_client zen.spamhaus.org >>>> >>>> To reject mails from spamhaus listed IP's. If I want to accept >>>> mails and relay to an admin email-id , is that possible. >>> Probably with a policy server and the REDIRECT action. >> Possible indeed. I'm trying to figure out why it would be wanted! > > - To evaluate the amount of false positives
As said before, this is a full time job for many people. Besides, it is not always possible to determine whether a message is spam or not, unless you are the recipient. > - To collect and seed a Bayesian spam filter before deploying you'll end up polluting your bayes db... there is a difference between: - we don't want any mail from this IP - all mail sent via this IP is spam for example, the PBL blocks mail from "residential" systems (which helps blocking a lot of botnet junk). but this doesn't mean all mail from pbl listed IPs is spam. Same goes for XBL. an IP that is infected can still send "legitimate" mail. it is blocked waiting for the problem to be fixed, not because "all their flow is spam".
