On 27/05/2025 01:15, Dave Crocker wrote:
* A normative practice to have only one recipient per message. This
is needed for O/R signing, but does not need a change to DKIM, per se.
This requirement can be almost entirely relaxed, as rt= is actually only needed
for Bcc:.
See e.g.
https://mailarchive.ietf.org/arch/msg/ietf-dkim/1NoBJCqu34_069P_EZe_i1AWzxA/
Best
Ale
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