Please forward this email to one person who'd benefit from it (because there's nothing like a personal recommendation), then delete it when you're finished reading, so it doesn't sit zapping energy on a server.
Yes, deleting emails reduces your carbon footprint. In fact, according to The Good Planet, if everyone around the world deleted just 10 emails (spam or not spam), that would save 1,725,000 gigabytes of storage space, which is around 55.2 million kilowatts of power.