Apple Mail Question

Hello!

I plan on downgrading from Yosemite back to Mavericks. Performed a fresh Install of Mavericks on an external drive.

Can I transfer all my Yosemite mail.app data (mailboxes....etc) and Gmail mailboxes back to Mavericks. What data do I have to copy and where do I copy the data to in Maverick's?

Thanks in advance!

AJ