On Thu, 15 Jul 2021, Bastian Blank wrote:
Did you check the result of those RBL requests? Spamhaus also provides specific codes for errors, so you _must_ explicitely list what codes you want to accept. See https://www.spamhaus.org/faq/section/DNSBL%20Usage#200 what those mean.
I've been consuming SBL-XBL for years. But I don't have Postfix checking for specific results -- I'm not sure I care whether those addresses were temporarily listed (127.0.0.0/16), nor my 200 queries a day managed to trip some policy limit (127.255.255.255), nor were the queries via a public/open resolver (127.255.255.254), nor were they DBL queries that might have been malformed (127.255.255.252), it has become problematic for me to continue using. Perhaps it was due to a bug -- we'll see what Matthew finds -- in which case I might risk using it again provided a fix is also described as having been made.
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