Function never 

pub fn never(t: &Triaged, newsletters: bool) -> bool

Whether a message is never told, whatever the time: set aside (forged, spam, a borrowed name, blocked), in the review queue (your own filter flagged it, or moved it into a Junk folder), hostile, a code (it has its own notification), from yourself, in the less important accounts’ lane, a newsletter in the Filed lane unless newsletters (an automatic sender there, a bill from no-reply, is told), or read already.