It is probably easiest just to delete the mail from your inbox. Anyone with an interest in the topics of the list may join. We invite and welcome members of all companies and academic institutions, including researchers, end users, integrators, and suppliers, to join and actively participate. It is virtually impossible to achieve interoperability of equipment from different suppliers without special drivers and interfaces. Standards do exist, but they are not complete.
Different vendors couple the standards together in different ways.
There have been many specifications produced which demanded adherence to specific internationally accepted standards, but there is no general acceptance of a subset of standards that should be used in any given application. This is an industry problem. It can be solved but only by an industry wide approach to demand interoperability of equipment, especially with field Remote Terminal Units. It is surprising how few standards are required to achieve interoperability. This occurs because you have joined twice under different email addresses.