Function protected 

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

What no spam verdict touches, your provider’s or Sioul’s own filter’s (the owner’s decision; docs/porch.md, “Set aside”): mail from anyone but a stranger (safe, neutral or restricted: in your address books, on a list, let in), a code or a password, mail a project’s routes take, your own; and a message you said is not spam, here, on another device or in another mail client (spam::labels::said_ham). Blocked and forged mail, and a stranger borrowing a name, are set aside before this is asked.