[Mailman-Users] short question, probably an FAQ that I've overlooked.

John W. Baxter jwblist at olympus.net
Fri Jun 3 03:29:27 CEST 2005

On 6/2/05 6:07 PM, "John W. Baxter" <jwblist at olympus.net> wrote:

> Not really.  Some MUAs preserve the full Bcc header for anyone in that
> header, but removed it for the To: and Cc: recipients.  Others set up a Bcc:
> header with just the individual recipient's address (clearly these talk to
> the MTA separately for each Bcc: recipient).  And most remove it.  All these
> behaviors are sanctioned by the RFCs (clearly a compromise in the RFC
> development process).

What I didn't say and should have is that the MTA used for submission may
also play a role in this process.

There's a lively discussion in the exim-users list archives (sorry, no URL
handy).  That discussion included a rehash of the issue on the appropriate
IETF list (requested by Exim's developer, Philip Hazel--also the father of
the PCRE code).  The essential result was that MTAs when not acting in
submission form as "part" of the MUA should leave any Bcc: headers alone.


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