Tinne11 via Postfix-users:
> Is there some parameter which could have been named
> enforce_mime_output_conversion in analogy to disable_mime_output_conversion
> or some other way to configure this?
It would avoid the need for (null) content filters that I discuss
in my other response. However this is no as simple as it might
appear to be.
Presently, MIME downgrade is an after-queue feature (i.e. after
mail is queued), implemented only in the SMTP delivery agent.
On the other hand, DKIM signing must be a before-queue feature (i.e.
before mail is queued) because the Postfix Milter implementation
requires that Milters can make changes to queue files. Delivery
agents must not do such things.
Therefore, downgrade-before-signing would also have to be made
available as a before-queue feature. Unfortunately I don't have the
time for doing that.
Wietse
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