On 06/11/2023 20:53, Luis F. V. Gomes via Exim-users wrote:
> I sent 2 messages to the list I'm on.
> On the first message I put myself in the Bcc field (that's what I usually do)
A Bcc: header really is not a thing, as far as an MTA is concerned.
You have to go out of your way to make Exim do anything with a Bcc: header.
Putting "Bcc" on a message you are sending (using an MUA, which is something
external to Exim) *should* add the addresses you say there to the set of
addresses passed to Exim in the SMTP "RCPT" commands, but not include them
in the "To:" header list of addreses. It should *not* add a "Bcc:" header -
the whole point of Bcc is to not leak those extra destinations of the message
to every recipient.
Now: will Exim de-duplicate message destinations? Yes, as far as it can.
It's not perfect; there are situations it cannot. But it's quite likely
for simple configurations.
--
Cheers,
Jeremy
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