I have tried to find a solution for this for a while now without luck. Wanted to check if there already is an add-on or easy hack before I attempt to write my own.
In my opinion this must be quite a common scenario:
Thunderbird is configured using IMAP.
In order to save mailbox storage space I want deleted messages to end up in my Local Trash folder and not in my IMAP Trash folder when messages are deleted.
Is there any way to achieve this? (I know I can move messages from IMAP Trash to Local Trash manually).
Server Settings only show IMAP folders as alternatives: