k-9 Mail Delete issues

I believe, though I haven't tested it, that if you go to Account Settings, then to Folders, then scroll down to Trash folder and set it to <NONE> that when you delete a message, it will be gone. You may still have to compact (see below). I set the Sent folder to <NONE> as I don't care about saving sent message on my phone, and that works perfectly.

I keep the storage on the SD card, so I don't really care. (Settings->Account Settings->Storage).

To get rid of all the data, you need to compact the account. To do so, go to the Accounts window... Menu->More->Accounts. Then longpress the account you wish to compact, select Advanced->Compact.

 

Hmmm... I just looked at it here on my Droidx, and I can't find any setting anywhere to automatically delete trash items. I never even looked at it, and had more then 200 old emails in the bin.