When an email comes into a Gmail account, in what order does spam filtering, filter rules, and email forwarding happen, and how do they affect one another?
E.g. will emails be forwarded (by email forwarding or by a forwarding filter rule) or not if they are classed as spam?
Can filter rules affect what non-filter-rule email forwarding forwards, e.g. by removing the email, or by marking stuff not-as-spam (if spam would otherwise not be forwarded)?