[Users] Where do duplicate messages originate?

[Dave Howorth]

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?