Normally, the originator's email system would send send the cc: copy directly to user A and one copy to LISTSERV. LISTSERV should send only one copy to user A (the copy "through" the list); if it also observed the cc: and sent another copy, user A would receive three copies.

On Sep 16, 2014, at 10:35 AM, Shinn Wu <[log in to unmask]> wrote:

Hi Mark,

But it was ListServ sent unique message-ID to single recipient as I saw from gateway (Barracuda) before it reached Exchange (which would certainly remove the duplication). I also reviewed the ListServ log and maillog, and it only sent single copy even though sender cc: to recipient (who belonged to the list).

Shinn

To unsubscribe from the LSTSRV-L list, click the following link:
http://peach.ease.lsoft.com/scripts/wa-PEACH.exe?SUBED1=LSTSRV-L&A=1