When searching, the folder in which the message has been found should be displayed in an additional column: inbox, sent…
Or the search should be limited to the current folder.
We currently see this as less crucial as the local/synchronized index allows you to (repeatedly) search very quickly and view messages in threaded mode.
There are folks who like to keep messages in folders, and use filtering to distribute incoming messages.
If it’s impossible to see which folder a given msg is in, it’s virtually impossible to check/debug filtering.
Is it possible to search only a selected folder? This was possible in the ‘Advanced Search’ of old interface but not sure if there’s a search string that can filter to certain folders only.