Move Mail storage from phone's internal memory to the SD Card I am not too concerned with the security aspect of putting my mail on the SD card, I am however very interested in moving the mail storage from the phone's internal memory to the SD card. 

I have looked at the Gmail app and the stock Mail app and neither of them seem to be movable to the SD card so does anybody know if this can be done?

To be more specific, I really do not need to move the app itself, only the mail storage so if there is a way to move the storage location of mails from the internal memory to the SD card I would be very interested to know how that is done.
Only if you rooted, you can use data2sd (original version at Google Play; later modification by enthusiasts at XDA), where /data/data linked to /sd-ext/data (or just sdcard mounted to /data). Then ALL application data will be stored on SD Card.