I don't think anything I said is in conflict with what you've said, I'm pointing out one of the reasons the poster might still be getting spam from a mail he's reported as spam. The can spam act was more about senders requirements than email platform providers requirements for recieving (i.e. spam filtering). Yes the republicans were more affected by the spam filters but both researchers and internal communication indicated it wasn't because of any deliberate bias (just that republican emails were more likely to be like spam as far as an algorithmic interpratation goes (pure uncharitable conjecture: perhaps because one party was more likely to include a unsubscribe button even if it wasn't required by the can spam act and thus weren't reported as spam as much). Because of this they sued and google reportedly made more tools available or atleast publicised existing tools to both republicans and democrats to exclude their email campaigns from getting caught in the spam filters (tools that have also been made available to some of the larger more legitimate bulk email providers).