One person, one inbox
Reach the archive
Every message gets a reply within two working days.
Directly
This always works, and it is the route I would use.
Or through the form
Anything about the projects in the register, the standard behind them, or work. Concrete questions get better answers than general ones.
What you send reaches one inbox and is used only to reply. Nothing is added to a list. The privacy page says exactly what happens to it.