This is maximum number of compressed/packed files within compressed/packed files before Kaspersky AV scanner will report a nonscan error.
Security Plus scans messages inline, using the Kaspersky Anti Virus Engine, during each SMTP session, effectively stopping malicious software at the email entrance to your network.
Security Plus for MDaemon provides the next generation of antivirus and spam protection for the MDaemon Messaging Server by halting viruses on all inbound and outbound email at the server before it's passed on to client PCs, providing real-time spam, Recurrent Pattern Detection Technology (RPD)™, Zero-Hour™ Virus Outbreak Protection, Inline Virus Scanning Kaspersky Anti Virus Engine, Urgent Update Notification, and more.
It is the number one solution for safeguarding your MDaemon mail server.
This includes Spam Assassin, World Client, BES and other features.