Mail storage on card?
 

I use Evernote and would love offline access to my notes on the n810. The only way I've found to do this is with Evernote's IMAP access. However, it seems that my notes take up too much space on the device. Is there a way to configure the built-in mail client to store offline messages on the mini-SD card? I've looked around but haven't found anything yet. Thanks.