> On 12 Nov 2026, at 06:25, Steffen Nurpmeso <[email protected]> wrote:
>
> TCP was in RFC 1035 already.
> The problem is that (a) it is the fallback for resolvers, (b) the
> UDP part may already have sent two (v4, v6) packets before instead
> of only one, and (c) that PQ algorithm is simply a brain damage
> use case for DKIM, which is why DKIM does not use it.
You misunderstand the nature of the "fallback". TCP is used when a
UDP query returns "TC=1", rather than after multiple UDP queries
time out...
--
Viktor.
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