Kaspersky Security for Mail Server

For comprehensive defense against spoofing and BEC, Kaspersky Security for Mail Server uses advanced sender authentication, including SPF, DKIM and DMARC, to verify the authenticity and integrity of the sender and message content. It also uses domain sender alignment, which compares sender addresses in the SMTP session and in the message body, an anti-spam module for detecting sender spoofing, and real-time threat updates from Kaspersky Security Network (KSN).

For sender authentication, the product provides a unique level of rule-configuration flexibility based on SPF, DKIM and DMARC verdicts, while also offering predefined parameters and actions recommended by Kaspersky experts for advanced protection.

Yes. Kaspersky Security for Mail Server can act as a secure email gateway (SEG), providing perimeter‑based email protection.

However, the solution is more than a single gateway – it comprises three complementary applications that support multiple mail protection scenarios under a single license:

• Kaspersky Secure Mail Gateway functions as a ready‑to‑use SEG that identifies and blocks malicious emails before they reach users’ mailboxes.
• Kaspersky Security for Exchange Servers is tailored to protect Microsoft Exchange.
• Kaspersky Security for Microsoft 365 is an API‑based app that secures Microsoft 365 communication and collaboration services.

Organizations can choose one of these, or combine them, making Kaspersky Security for Mail Server not just a SEG, but a comprehensive email security solution for different infrastructures and needs.

Yes. Kaspersky Security for Mail Server is suitable for SMBs and large enterprises. The product is easy to deploy and manage, and offers flexible feature sets based on the organization’s needs: from essential protection against common, known threats for SMBs to enhanced technologies that defend against sophisticated targeted attacks for large enterprises.

This flexibility lets SMBs start with strong baseline protection and scale up as their security needs grow.

Kaspersky Security for Mail Server is offered in two licensing tiers – KSMS and KSMS Plus – which differ by features and target audience. KSMS provides essential email protection against common threats using proven anti-phishing, anti-malware and anti-spam technologies, sender domain authentication, QR phishing detection and more.

KSMS Plus is designed for organizations that need advanced email protection. It includes additional features such as content disarm and reconstruction (CDR), scanning of password-protected archives, advanced heuristics for detecting AI-generated emails and list linking (mail bombing) attacks, and other enhanced controls.