It's actually spelled Outbox. It's the model for decentralising relay usage. Everyone was looking at the same three clouds before.
Discussion
nostr:npub174renz9mthhvyfvfamsq8z94xw8w9v48ytvug09drz8v24vacy3sfrdhmn list had the item "go outside" once and he discovered there are more than three clouds.
you mean microsoft outlook? not quite following