> On Sep 1, 2016, at 3:27 AM, Daniel Margolis <[email protected]> wrote:
>
> Right. I understood you, but that was my question--I don't see any reason to
> remove hosts at worse preference from any invalid hosts, but only to remove
> those at worse preference from the current host to avoid loops. In a
> non-looping case, it's sufficient for the sending MTA to simply skip any
> hosts that are invalid and do whatever it would otherwise do (including using
> hosts of lower priority than the invalid ones).
The mistake to avoid is removal of hosts deemed invalid by STS *prior*
to checking whether the current host is one of those. That is, loop
elimination first, and only then STS policy on the remaining host.
Perhaps this seems obvious, but it is I think worth stating.
--
Viktor.
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