Peter Milesson via Postfix-users:
> Hi folks,
>
> I have noted that a dnsbl check is frequently run, even if the pregreet
> conditions drop the connection. See log excerpt below.
Pregreet and DNSBL checks run in PARALLEL, because both introduce latency.
Running them SEQUENTIALLY would introduce unnecessary delay.
You're supposed to be using a local DNS resolver that replies from
its local cache.
Wietse
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