I have a query on the size of the mailboxes that Zimbra desktop can handle without giving problems. I use Zimbra mainly for Yahoo mailbox offline use. I also have a google mailbox which I use only for mailing list and such subscriptions which is more than 4GB in size. I do not want problems with Yahoo mailbox if I configure Zimbra for google mail due to its size.

Any experiences with huge mailbox sizes and things to be aware of will be appreciated.