Le jeudi 15 mars 2007 20:34, Robert Hensel (Hensel Hosting) a écrit : > Hi folks, > > Yesterday, I received multiple reports from users that they had trouble > mailing us. After checking the maillog I discovered that > blackhole.securitysage.com seemed to block a whole lot of mail to us > (read: all)! I of course immediatly deleted this blacklist from our > reject_rbls but the host blackhole.securitysage.com was just > unreacheable (also see this page > http://wiki.openrbl.org/wiki/Blackhole.securitysage.com). Now it seems > weird that if the rbl host is unreachable Postfix decides to simply take > that as a "ah well, just block everything then", or maybe something else > was going on? I just see that on my own postfix too ! > What are you thoughts on this? You're right, a non response is not the same as a negative response. Postfix could consider a non response has "not blacklisted". As I say that, I realize that it opens a breach. Spammers have just to DDOS theses blacklists and spam will spread...
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