On Wed, Oct 22, 2025 at 10:14:53AM -0400, Bill Cole via Postfix-users wrote:
> The primary fix for this should be to use nameservers that don't regularly
> become unreachable. Timeout values and failover to second or third resolvers
> is normally controlled by the system resolver, not individual programs.
In other words, the ONLY entry in /etc/resolv.conf on an MTA
should be 127.0.0.1. And that resolver might use multiple
forwarders, but would then track which of its forwarders are
responsive and avoid the non-responsive ones (except for
occasional concurent probes to check whether they're back).
DO NOT make the mistake of listing remote nameservers in
/etc/resolv.conf.
--
Viktor.
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