Once you do that, they start sending mail referencing "s t o g o l d"
Changing domains costs them virtually nothing.
Know something about your subject before making a fool of yourself.
Not totally sure how that nullifies my fix for stogold when they have done, literally, nothing to prevent that from coming through in my mail since headstart, but ok.
I could do a longer psudocode thing where you have scripts scan reported gold emails for unique words that only occur in gold spam emails, store those, then cross-reference that when checking if they should allow mail through, but meh, it was too much effort.