I'm using IMAP with my Thunderbird for Android. I'd like to configure it so that when I delete a message it is moved to my Trash IMAP folder. This is equivalent to the setting I've been using for years on my various desktop versions of Thunderbird. However the "When I delete a message" configuration option only offers me the following choices: * Do not delete on server * Delete from server * Mark as read on server Why isn't "Move to folder" available as a choice? What do I need to do to enable that option? I did go into the "Folders" configuration and change the "Trash folder" from "Automatic (Trash)" to "Trash" in the list of IMAP folders for that account but that did not help.