We would need proof of work for emails but that never happened. All you can do is mark as spam then they get deliveravility issues if enough do it. But make su

We would need proof of work for emails but that never happened. All you can do is mark as spam then they get deliveravility issues if enough do it. But make sure it is spam. You shpuld try to unsubscribe first give them a fair go. I dont think we can solve it. Email is cheapish to send. Spamming for engagement works. It gets some people on the game, hooked on LinkedIn and they find their next job there. Boycott probably wont affect them.