Export then Import unsubscribes is very cumbersome. It adds extra awkward steps. User friendly would be to be able to select the emails as you scroll down and click Unsubscribe (simple and done), versus, select the emails as you scroll down, export those you want to unsubscribe, then import with the "Unsubscribe" button selected. Maybe allow both options if some prefer to take the extra steps, but have the user friendly step too please.
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