I think making a super list is the way people do this. Some mail systems will also suppress the same email sent twice to one person in a short span of time. -----Original Message----- From: LISTSERV site administrators' forum [mailto:[log in to unmask]] On Behalf Of Valdis Kletnieks Sent: Monday, November 14, 2011 7:17 AM To: [log in to unmask] Subject: Re: Duplicates on mailing lists On Mon, 14 Nov 2011 09:30:15 EST, Sante La Civita said: > Does anyone know how I can prevent people from getting more than one > duplicate email when they are on multiple lists? In other words, we send > one email to two lists and the person is on both list and therefore receives > two duplicate emails. In general, there's no really good way to totally address this issue. Listserv *can* do *some* duplicate elimination, sometimes. But there's corner cases it really can't do anything about: 1) person posts to list1@listserv and a copy gets sent to the recipient. Three minutes later, the person poststhe same thing to list2@listserv that the recipient is also on. 2) There's really no way for Listserv to know that [log in to unmask] and [log in to unmask] are really aliases for each other, or that [log in to unmask] is forwarding to one of the others. ############################ To unsubscribe from the LSTSRV-L list: write to: mailto:[log in to unmask] or click the following link: http://peach.ease.lsoft.com/scripts/wa.exe?SUBED1=LSTSRV-L&A=1 ############################ To unsubscribe from the LSTSRV-L list: write to: mailto:[log in to unmask] or click the following link: http://peach.ease.lsoft.com/scripts/wa.exe?SUBED1=LSTSRV-L&A=1