From: GrayHat <gr...@gm...> - 2010-07-26 12:47:51
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> Spammers know by now that SPF does help them to get their > spam delivered. (No graylisting,get bonus points etc) Fine, but to use GL they need to use a fixed IP/MX/netblock and this in turn means that DNSBLs may *easily* cut out their business in a matter of hours (not kidding) > I see spam coming through with legitimate SPF records. If emails pass your filtering just since the SPF record is ok then you probably have some config issues elsewhere, SPF isn't (and NEVER was) meant as a way to filter spam, just as a way to let "the world" know which IPs are allowed to send emails on the behalf of a given domain... and btw the same may be told about graylisting (delaying if you prefer), sure, a bunch of wannabe "admins" and hairdresser just adopted it since there was no effort in doing so, but they never really understood why it works and what it is for > Maybe you are right and this will accomplish very little, but maybe it > does deter some spam. The "maybe" belongs elsewhere, if you've been enough on computing and you're still using "maybe" then either you don't have all your ducks in a row when it comes to take some decision or you didn't really grab the way things work |