On Mon, Aug 7, 2023 at 8:00 PM Emanuel Schorsch <emschorsch= 40google....@dmarc.ietf.org> wrote:
> If there are not that many BCC recipients for a message then it is likely > not necessary as the duplicate message counting is unlikely to have a > negative impact. If there are a large number of BCC recipients for a given > message then I think the solutions proposed in Wei's DARA draft are > helpful: standardizing the way to indicate BCC/Forwarded-To and signing a > separate copy of the message for each BCC recipient so that it can still be > verified as direct mail. > Doesn't putting "invisible" recipients into an actual field like Bcc create a privacy concern, i.e., they're no longer invisible? You need to hope that the agents in the handling chain that are supposed to delete that field will actually do it, which presumes the entire deployed base will adopt DARA in a reasonable period of time. -MSK, participating
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