Poll External Accounts on IMAP check

[Elarys]

I've got a new Zimbra 7 server set up on my home network as a means to collaborate all my various external emails into one IMAP account (plus to allow easy access from multiple pc's/device's).

This works great if I use the Zimbra Webmail Client. Get Mail fetches all my emails, fantastic!

However, is it possible so that whenever I connect to my zimbra imap account (from thunderbird, or outlook), that all my external accounts can be poll'd at the same time?