On 21.04.21 00:11, RW wrote:
>Anything that enters through through the remote trusted network and
>hits ALL_TRUSTED will almost certainly pass whatever authentication
>mechanism are set-up for the domain.
>
>The difference between ALL_TRUSTED and ALL_INTERNAL will likely be
>small. There are minor advantages either way.

the diference would be, ALL_TRUSTED covers mail from trusted, but not
internal hosts, that are trusted not to fake headers, but still may
send spam.

On 22.04.21 00:07, RW wrote:
Unless a dynamic pool has been put into the trusted network,

...which is quite common at ISPs

this is
about authenticated relays. Spammers gain access to third-party
accounts to pass authentication tests - not to spam with a random
domain that will fail such tests.

still, authenticated mail is outgoing mail, not incoming mail, and you
should not expect it to be DKIM-signed, you have to dkim-sign it.

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