How to limit Apple Mail (desktop)?

[Sami Ketola]

> On 31 Oct 2017, at 8.42, Rupert Gallagher <ruga at protonmail.com> wrote:
> 
> When Apple Mail connects to an IMAP account for the very first time, it downloads all e-mails to build a local mirror.
> 
> When the user changes the name of a folder, Apple Mail downloads the whole subtree and erases the old one.
> 
> We have Apple Mail users with >20GB worth of e-mails, downloaded multiple times (horrified emoticon here).
> 
> Sent from ProtonMail Mobile


I can’t think of any easy way to rate limit Apple mail. Only thing that crossed my mind is to enable ID response
logging and then with some logwatch process use some traffic shaping solution to limit the bandwith of that particular
connection after some period of time.

Sami