Will turning of Ack for the subscriber causing the duplicate correct the
problem?

-----Original Message-----
From: John Lyon [mailto:[log in to unmask]]
Sent: Friday, May 09, 2003 10:51 AM
To: [log in to unmask]
Subject: Re: Duplicate Messages


> The list is a moderated list and only accepts messages approved by the
> moderator. The duplicate messages are all coming from the moderator.
> Although, some subscribers have indicated that they are not receiving
> the duplicates, the logs appear to indicate otherwise. Is it possible
> for a system to "reflect" a message back and bypass the authority of
> the moderator?

In this case yes, as the Approved-By:  header is already there.

> You are correct that there are an additional 6 lines between the two
> messages. Is there a way within LISTSERV to view the entire header
> information, or will I need to pull the headers from a subscribers
> mailbox?

The archives don't keep the full headers, you need the delivered copies from
a subscribed address. Whenever there is ANY message duplication, the full
headers is the place to find the duplication.


> -----Original Message-----
> From: John Lyon [mailto:[log in to unmask]]
> Sent: Wednesday, May 07, 2003 11:11 AM
> To: [log in to unmask]
> Subject: Re: Duplicate Messages
>
>
> > One of the lists on our server is sending duplicate messages to
> > subscribers. The messages appear in the archives and in subscriber
> > mailboxes with identical time and date stamps. I have confirmed in
> > the LISTSERV log that it is actually sending the message twice not
> > the SMTP server causing the duplicate distribution.
>
> You have a subscriber who's gateway is "reflecting" the message back
> to LISTSERV rather than bouncing it according to standards. Looking at
> the full headers of the duplicates should give you a clue on who this
> subscriber is. You will notice in the archives, each duplicate message
> has an additional 6 lines of text. The is the additional received
> headers which will point to the offender.