How to limit Apple Mail (desktop)?

[Rupert Gallagher]

By default, Apple Mail downloads all e-mails from  server's account. Previous versions of this client allowed to opt-out. The latest two versions? however, only allow to opt-out from downloading the attachments.

The stress on the server is unbearable. We cannot ask users to be considerate: this is the default behaviour of Apple Mail.

We need a server-side solution to the problem.

Please share your ideas.