DMARC is a crucial piece of email security that helps prevent phishing and spam by giving domain owners control over where emails originate. The protocol works alongside SPF and DKIM to identify fake messages, maintaining the sender-driven nature of email while helping ISPs and security companies determine if an email comes from a trusted source. By setting up DMARC, businesses can ensure their customers receive legitimate emails quickly, reducing the risk of phishing attempts and protecting their brand reputation. With over 50 million credits given away to Postmark customers who have set up DMARC on their domains, this offer is a valuable incentive for businesses to prioritize email security. The goal of scammers, including those behind phishing campaigns, is often financial gain, making it essential for businesses to take proactive measures to protect themselves and their customers from these threats.