>> spamhaus RBL with public DNS like google or openDNS will return >> all invalid checks
just in case, the reason for this http://www.spamhaus.org/faq/answers.lasso?section=DNSBL#261 can be found here http://www.spamhaus.org/organization/dnsblusage.html if you setup your mailserver (or the DNS it uses) to forward queries to a public resolver like (e.g.) google, opendns, level-3 and so on, the spamhaus DNS servers hosting the DNSBLs and which will get queried, will "see" the IP of the public resolver(s) you're using, now, imagine a number of mailservers all around the world using some open dns resolver, the amount of queries from the resolvers IPs will quickly go over the SpamHaus query limit (for free usage) so the rate limiter will kick in and all further queries will receive an "NXDOMAIN" (aka not listed/present) answer which will in effect make totally useless the queries to the DNSBL... uh, and by the way the same issue applies to several other DNSBLs not just to the spamhaus ones Bottom line, use your own DNS resolver(s) this way the DNSBLs will only see YOUR IPs and you'll be in control, btw, then, in case your query rate is over the "free" limits you'll have to sign up for a paid account and/or (better) setup your own, local, rbldnsd and locally host copies of the DNSBL zones you want to use (and btw this will speed up lookups a whole lot) as described here http://www.spamhaus.org/faq/answers.lasso?section=DNSBL#204 ------------------------------------------------------------------------------ The Planet: dedicated and managed hosting, cloud storage, colocation Stay online with enterprise data centers and the best network in the business Choose flexible plans and management services without long-term contracts Personal 24x7 support from experience hosting pros just a phone call away. http://p.sf.net/sfu/theplanet-com _______________________________________________ Assp-test mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/assp-test
