50% of all tries against spamd it does NOT hit while the scantime for the whole message is arounnd 3 seconds - since there is a local unbound-cache with
cache-min-ttl: 300 cache-max-ttl: 10800it's impossible that there are happening dns timeouts and i can observe the same behavior randomly with URIBL_LOCAL where the unbound dns cache on 127.0.0.1:53 talks to rblsdnsd on 127.0.0.1:1053
that smells why ever very unrelieable and frankly i observed similar with SPF_PASS / SHORTCIRCUIT where people within 5 seconds get the same message and one get USER_IN_SPF_WHITELIST while the other goes through all tests
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