On Freitag, 23. Juni 2006 17:43 Jeff Chan wrote: > Please see the topic of the original message. Such a BL has > already been created by Rick Wesson of ar.com.
I've read it, but it didn't say how reliable that BL is. Does it 100% cover all new domains world wide, or just for some? Is it directly from registrar data? > Yes, it's possible to use SA to reject at the MTA level, but it's > not the typical use due to the significant overhead of running > SA. Typically the MTA is used to first reject as many of the > messages as possible due to RBL inclusion and other relatively > quick and easy things to check. SA then processes the ones that > survive. I know, I do it that way currently. I mean that soon we will find us having a third level of check, after the first HEL/MAILFROM/RCPTTO rejects and before the SA checks. Because for this BL with "max. 5 days old domains" to be used in a wise way you need to scan for URIs within the mail. This is the only way to stop spammers from using <5 days old domains. If they can't promote it cheaply, they won't use it. This is some sort of greylisting, with the exception of using a central BL. It could be called greydomaining or something like that. So the name already gives an idea how it works. mfg zmi -- // Michael Monnerie, Ing.BSc ----- http://it-management.at // Tel: 0660/4156531 .network.your.ideas. // PGP Key: "curl -s http://zmi.at/zmi3.asc | gpg --import" // Fingerprint: 44A3 C1EC B71E C71A B4C2 9AA6 C818 847C 55CB A4EE // Keyserver: www.keyserver.net Key-ID: 0x55CBA4EE
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