[Users] Create filter rule : automatically

[Paul]

On Sun, 22 Nov 2020 17:35:50 +1100
Liz <edodd at billiau.net> wrote: 

> Could someone explain the philosophy of the automatic filter creation?

There's no philosophy, just a check for headers, which are queried
sequentially until one is found:

List-Id
X-BeenThere
X-ML-Name
X-List
X-Mailing-List
X-Sequence
Sender
List-Post
To
Subject

You will note that six of those are variations of mailing list headers.

with regards

Paul