Re: I see that it's enabled by default, meaning that the user will get all junk mail addresses here, even though they are in Spam folders
Actually, spam (and deleted) folders are not scanned for addresses.
But you're right, I'm not sure if this should be enabled by default.
Users!!!
Kostya, let me answer your inquiry.
Personally, I wouldn't want that to be enabled by default. With some of the accounts, I am getting so much "noise", that it would overwhelm this feature.
(And in 1-2 accounts, for convenience, I mapped a folder where I save all this noise as "archive", so, I don't want those messages to be analyzed either.)
If I were making the design decision, I'd do this "harvesting" only from the recent "Sent" messages. And then if the incoming message is recent, I can always find it and go from there.
But I can see that some other people might have a different modus operandi.