Blocked emails still appearing on Mac, iPhone, and possibly iPad

There are several junk emails that I have blocked, moved to the trash, double-checked that they're blocked, and they still come through on my Mac, iPhone, and I haven't checked the iPad but I'm assuming they still come through on it too. The problem isn't in my settings, how do I stop these junk & scam emails?

[Re-Titled by Moderator]