Function set_aside 

fn set_aside(
    card: &Card,
    ctx: &Context<'_>,
    trust: Trust,
    sender: Sender,
    protected: bool,
) -> Option<(Lane, Reason)>

Blocked, forged, borrowing a brand’s name, or spam: set aside, never deleted. A sender you let in keeps the name they use. Spam here is your provider’s word; it never reaches what is protected. Sioul’s own filter’s verdicts go to the review queue instead (review).