Ok, so I wonder how labels in gmail works :)

one mail folder, you use lables to filter mails to be (not) seen by the mail client. Of course, one can virtualize folders by returning any message with a specific label in a virtual IMAP folder of that name.

...

BTW: There was some talk about a virtual trashbin, "virtually" containing all messages marked as deleted in all folders. It's the same. Bye,

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Steffen Kaiser

Thanks for your answer,