What custom RBLs are you folks using these days?
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Posted 19 August 2019 - 06:03 AM
in addition to the Barracuda RBL I'm using sbl-xbl.spamhaus.org, which helps a lot and has hardly any false positives, and ix.dnsbl.manitu.net, which is quite useful in German speaking countries, but may be less so elsewhere and had at a certain time in the past problems with false positives.
In my view sbl-xbl is absolutely necessary to get decent Spam detection rates on an ESG.
Posted Yesterday, 12:17 PM
and the vast majority of our external RBL blocking comes from the spamcop and spamhaus lists. We've had no false positives from either that I know of.