--On Sunday, April 15, 2012 16:14 -0400 "Robert A. Rosenberg"
At 10:04 -0500 on 03/01/2012, Hector Santos wrote about Re:
"proper" handling of BCC:
There is also the consideration regarding displaying. The
MUA may want to inform the BCC recipient to the privacy
nature of the message:
NOTE: THIS IS A BLIND COPY TO YOU. THE OTHER RECIPIENTS
LISTED IN THE TO/CC DISTRIBUTION ARE NOT AWARE OF YOUR
RECEPTION OF THIS MESSAGE.
Query - For issuing this message, how do you determine that
the recipient is getting a copy of the message without being
listed in a To or Cc header due to being BCC'ed or being
subscribed to a mailing list (or do you treat a mailing list
received copy as a BCC'ed copy)?
I ignore the case of being listed in a To or Cc as a
suppressed address (ie: Group-Name:add1, add2, etc. ;) since
the existence of a group-name:; comment implies a hidden BCC
If I correctly understand the question, I simply put a "bcc"
field in the message as I submit it to the MUA. It removes that
field. constructs the "blind copy" warning text, and constructs
the envelope(s) appropriately (typically one envelope for the
set of To and Cc recipients and one for each Bcc one) for
handoff to the Submission server. Of course, if one had a
submission server that was smart about these things, the MUA
could hand the message, including the Bcc field, to it and let
it sort out envelopes (which it needs to do anyway) and the
In case it wasn't clear from Hector's message, this is not
theory. There are several MUAs, including the one I'm using,
that are able to behave exactly as outlined above.