On Tue, 16 Sep 2014 08:35:11 -0700, Shinn Wu said:

> But it was ListServ sent unique message-ID to single recipient as I saw

Right.  Listserv sends one copy.

> maillog, and it only sent single copy even though sender cc: to
> recipient (who belonged to the list).

Right. Because it doesn't *care* what the cc: list is, and it never even
*sees* the other copy.

So you should get *two* copies in this case. One direct from sender to
the recipient via the cc: entry, and one via listserv.  Most of the time,
the recipient's mail system will then proceed to munch whichever copy
arrives second...

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