[Evolution] How can I limit the amount of cache evolution is using?

[Fabrice Triboix <fabrice triboix me uk>]

Hello,

I would like to know if there is a setting I can use to tell evolution
what is the limit I want it to use for caching data.

I just add one email account, and it already downloaded 1.2GB of data!
I still have 4 email accounts to add, and that would make way too much
data stored locally.

Thank you very much for any help!