Hi Thomas Thank you for your detailed coments. I'm glad to know your advice.
I'm sorry that my question(s) is not associated with Lyx itself, but I have another question about this Lyx ML.
Why this ML doesn't use "Reply-to"? Japanese ML which I belong to is often use Reply-to.ML adress, in the case of Lyx ML; lyx-users@lists.lyx.org, should be set as Reply-to.
Best regards, T Shiihara