E-mail security continues to be a hot-button issue for IT administrators, who now find more moving parts in mail security solutions than they did just a couple of short years ago. Fighting viruses and spam were the original spurs for creating e-mail security appliances, and anti-spam is still the most important component of mail security. But the solutions have evolved to meet a host of additional requirements. These include securing connections between users, both internal and external; preventing loss of corporate data; stopping new types of threats such as phishing, spyware, and other types of malware; and blocking DoS and other network attacks as well as some application-layer attacks on mail servers.