I would like to suggest an improvement to Thunderbird's “Move To → Recent Destinations” function.
I use an extensive and systematically organised email archive with folders nested five, six, or sometimes seven levels deep. A typical folder structure might look like this:
Customer → A–E → Anton Maier → 2026 → Projects → Project A → Proposals
When an email arrives in my Inbox that belongs in the final “Proposals” folder, I would expect to be able to move it there and then use “Move To → Recent Destinations” for subsequent emails that belong in the same folder.
Unfortunately, “Recent Destinations” does not seem to work reliably for folders nested this deeply. As a result, I repeatedly have to navigate manually through the complete folder hierarchy:
Move To → Customer → A–E → Anton Maier → 2026 → Projects → Project A → Proposals
This becomes quite cumbersome when processing and filing many emails.
It would therefore be very helpful if “Recent Destinations” could remember and display recently used destination folders regardless of their nesting depth.
In fact, this feature becomes even more useful the deeper the folder structure is. For a folder only one or two levels below the account, manually navigating to it is easy. For a destination six or seven levels deep, however, a reliable “Recent Destinations” function could save a considerable amount of repetitive navigation.
Ideally, Thunderbird should simply remember the full path of the most recently used destination folders and make them directly selectable under “Move To → Recent Destinations”, irrespective of how deeply they are nested.
This would be a relatively small change from a user's perspective, but it would significantly improve email filing and workflow efficiency for users with large and carefully organized folder structures.