In fact, with the feature to move the email database to the external SD-card, i could finally deinstall K9 Mail from my Smartphone. The only reason i am keeping it installed is its function to save the complete email database to the SD, so that i do have all emails with me at any time (i am a professional user, i need my phone for business).
Another thing about Aquamail is very strange :
My smartphone is a SONY Xperia Pro, currently the most powerful Android device with slider QWERTY keyboard available in Germany, as Motorola decided to restrict the Photon 4G to the US.
I love that phone, besides for the very weak single core processor, and the 420 MB usable storage space only. I could help myself by rooting the phone and using link2SD to create a separate 1 GB partition on my SD, thus enlarging the available storage by 2.5x .
Aquamail is installed on this 1 GB partition, however, it will still store email in the main 420 MB ROM storage, eating up to 10% of my total storage this way ? I know that my setup is unusual, not many users may have rooted their phone and create additional ROM on a partition on the SD card, which is actually recognized as additional ROM by Android, but is there any chance to convince Aquamail to store the data on the same partition as where the main app is, and not in the main ROM ?
The perfect feature, of course, would be if i could choose the location of the email database myself, as what K9 Mail will allow me to do. Again, if Aquamail could do this, i would delete K9 Mail from my phone.