Disable private messages between members but only between one admin and one member

[Canapin (Coin-coin le Canapin)]

您好，没有必要在8年前的帖子中交叉发布，让我们继续讨论您最初的帖子:slight_smile:

How do I disable personal messages between members, but not admin to members?

How do I disable private messages between members but not admin to members in the latest version?