Email Account limit storage

Dear VO support,

We are considering the possibility to use your software in our small company in Spain. So far everything looks great!

We have installed the VO in our Windows Server and it runs fine.

When I configure either a POP3 or IMAP account, on the VO desktop I can see a limit of 1000MB. Even if we are storaging the emails on our server is there a limit?Is it the same in the case of an IMAP account?

What should we do when we get to that limit?
We work with very heavy files, so I think that if we start using your software we are going to get there easyly.

Thank you very much!