> 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.