Bill, thank you for you very clear and detailed explanation (as always).
Very much appreciated!
I would have expected something like below before ###1, (i.e., remove the "not" and add a "stop")
Code:
if header :contains "X-Delivered-To" ["myspamhotmail@rab.fastmail.com"] {
stop;
}
But your solution cleverly allows to still use the forwarding/vacation/organizing rules for that address.