If not, why not? Am I misunderstanding the purpose of the sorter? What I’m really after is activating a dialog that functions as an any-context capture for DEVONthink, which is what the Sorter at least seems to be trying to be. But if that’s correct it doesn’t make sense that it won’t capture from Mail.
The Sorter does not clip emails from Apple Mail. You can use its Navigation view to file dragged and dropped emails.
Its functions are described in the In & Out > Sorter or Windows > The Sorter sections of the built-in Help and manual