It appears with further research into the logs that every message to
this particular list is getting the "duplicate" NDR?

Jason Tyler, 
MCSA, Security+, Network+
Kent State University
Email Administrator
ListServ Administrator
330-672-1325
extension. 21325
 

-----Original Message-----
From: LISTSERV site administrators' forum
[mailto:[log in to unmask]] On Behalf Of Nathan Brindle
Sent: Wednesday, June 06, 2007 9:16 AM
To: [log in to unmask]
Subject: Re: List with many similarly formated messages

I would be more inclined to think that the dups you are seeing are a
particular kind of bounce that simply looks like a duplicate.  I doubt
that just because they are similarly formatted, LISTSERV is detecting
them as duplicates; in theory at least, if the internal text is
different, the CRC LISTSERV generates for each message body should be
different.

You need to look at the full headers of the messages that are being
bounced back as duplicates and see if there is any indication that they
are actually messages that have been processed by the list and sent on
to subscribers, whose mail servers then turned them around and sent them
back to the list instead of bouncing them properly to the RFC821 MAIL
FROM: address.

I wouldn't recommend turning off the loopcheck until you make sure that
this isn't what is actually happening, otherwise you're likely to open
the list up to a loop.

Nathan

At 08:48 AM 6/6/2007 -0400, you wrote:
>I have a list that is used by librarians across the country to post
>official notifications of Dewey Decimal classification errors etc. Most
>of the posts are very similarly formatted. I am getting complaints of
>"duplicate" posting notifications. Is there a way to turn off that
>feature for one specific list? And is there a log where I can track if
>indeed every post is being bounced with that message?
>
>Thanks guys,
>
>
>Jason Tyler, 
>MCSA, Security+, Network+
>Kent State University
>Email Administrator
>ListServ Administrator
>330-672-1325
>extension. 21325
>