DMARC is a vendor that offers a solution designed to enhance email security by implementing the DMARC (Domain-based Message Authentication, Reporting & Conformance) protocol. This tool helps organizations protect their email domains from unauthorized use, such as phishing and spoofing attacks. By providing visibility into email authentication issues and allowing domain owners to specify how email messages that fail authentication should be handled, DMARC aims to improve the overall integrity and trustworthiness of email communications. The service is particularly beneficial for businesses looking to safeguard their brand reputation and ensure secure email delivery.