> zen is, for all practical purposes, perfect. You will not get false positives > as everyone in zen is either a confirmed spammer or in the PBL (policy block > list). That is to say, no one in zen should be connecting to your mailserver > to send mail, ever. > > <http://www.spamhaus.org/zen/> > > zen blocks these categories: > > SBL Direct UBE sources, spam operations & spam services > CSS Direct snowshoe spam sources detected via automation > CBL (3rd party exploits such as proxies, trojans, etc.) > PBL End-user Non-MTA IP addresses set by ISP outbound mail policy > > SBL and CSS are confirmed spammers. CBL are confirmed exploited machines. PBL > are IPs that the IP owner has classified as not allowed to send mail directly. > > Blocking all of those is perfectly safe.
Would anyone agree/disagree with this? If there is a consensus that this is true, I will add zen.spamhaus.org to postscreen_dnsbl_sites. - Grant
