What type of filtering does FortiMail provide?

FortiMail is designed specifically for email security, which encompasses various forms of filtering to protect against email-borne threats. The core functions of FortiMail include email filtering, spam filtering, and malware protection. This means that it not only identifies and blocks unwanted emails, which can include spam, but also scans incoming and outgoing messages for malware, ensuring that users are safeguarded against potentially harmful content.

This ability to manage and filter email traffic effectively helps organizations reduce the risk of phishing attacks, data breaches, and other security threats associated with email communications. In contrast, other types of filtering mentioned in the options relate to different aspects of network security that FortiMail does not specifically address. For example, network filtering typically involves monitoring and controlling traffic at the network level, while firewall filtering focuses on managing traffic through specified security policies. Thus, the primary function of FortiMail is accurately captured in the first option, making it the correct answer.