[Users] Where do duplicate messages originate?

[Bob Williams]

On Sat, 2 Nov 2024 21:20:20 +0000
Dave Howorth wrote:

> On Sat, 2 Nov 2024 20:21:02 +0000
> Bob Williams <usenet at karmasailing.uk> wrote:
> 
> > On Sat, 2 Nov 2024 15:32:58 +0100
> > Jakub T. Jankiewicz wrote:
> >   
> > > On Sat, 2 Nov 2024 14:23:12 +0000
> > > Bob Williams <usenet at karmasailing.uk> wrote:
> > >     
> > > > Where do duplicate messages come from? I get quite a few, all in
> > > > mailing lists. Are they 'pushed' by the mailing list server or
> > > > 'pulled' by the MUA?      
> > > 
> > > The reason for the is because the person reply to all, including
> > > the author and the mailing list. So you get one from list and
> > > direct from the author.
> > > 
> > > I replied only to the list and not to you, so you should have a
> > > single email.
> > >     
> > Thank you. I probably wasn't clear enough in my original post. I am
> > well aware of the problem of replies being sent to both the list and
> > the poster, but that is not what I am talking about. These messages
> > are not duplicates because they are addressed to different
> > recipients.
> > 
> > I often see identical messages  in the Message List. When I use
> > Tools  
> > > Delete Duplicated Messages they are cleaned up, leaving only one
> > > copy  
> > of the message. I am curious as to what causes these duplicates.  
> 
> I occasionally see isolated duplicate messages. I always assume these
> are due to some problem with the senders' mail systems rather then
> with me or with claws mail.
> 
> How often is 'often'? And is there any pattern or commonality in the
> people/organisations or mail-agents used by these people?

I haven't worked that out yet, but I suspect you're right - it's on the
sender's end.

There is an example in another list I subscribe to, each message has an
identical Message-ID, but the Return-Path is different:

Return-Path: <SRS0=xnr3=R6=lists.opensuse.org=support-bounces at opensuse.org>
Return-Path: <SRS0=zSmU=R6=lists.opensuse.org=support-bounces at opensuse.org>

I haven't spotted any other differences in the headers. Anyway, it's
not a Claws-Mail problem, so end of thread.

Thank you.

Bob



-- 
Bob Williams