Fortinet VM16.
Enterprise-grade email security, sized for high-volume mail flow.
FortiMail VM16 is the 16 vCPU virtual-machine license tier of Fortinet's FortiMail email security platform,
built for large enterprises processing heavy inbound and outbound mail volume. Deploy it on VMware, Hyper-V,
KVM, Citrix XenServer, or your preferred public cloud, and get the same multi-layered anti-spam,
anti-malware, and advanced threat protection as Fortinet's physical appliances — without the hardware
footprint. Scale storage, memory, and throughput to match enterprise mailbox counts and message rates.
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Specifications
VM16 at a Glance
Virtual Hardware Requirements
16 vCPU cores licensed maximum. Memory: 4 GB minimum, up to 128 GB
recommended for peak load. Storage: 250 GB minimum (for initial OVF deployment, can
shrink to 50 GB after), up to 12 TB maximum. Requires 1–6 virtual NICs.
Capacity
Supports up to 1,500 protected email domains and 1,500 / 7,500
recipient-based policies (per domain / per system). Server Mode supports up to
3,000 local mailboxes. Antispam, antivirus, authentication, and content profiles:
50 / 600 (per domain / per system).
Supported Platforms
Runs on VMware ESX/ESXi 6.0+, Microsoft Hyper-V Server
(2012/2016/2019), KVM (qemu 2.12.1+), and Citrix XenServer. Also deployable on
AWS, Microsoft Azure, Google Cloud Platform, Oracle Cloud Infrastructure, and Nutanix AHV.
Deployment & Licensing
Supports Gateway, Transparent, and Server mode deployments. Includes
Data Loss Prevention and centralized quarantine by default. Optional
Microsoft 365 / Google Workspace API integration add-on. Licensed via 24x7 FortiCare + FortiGuard Base or Enterprise ATP bundle contracts.
Not sure VM16 is the right tier?
Compare FortiMail VM01 through VM32 side-by-side to match vCPU, memory, and throughput to your mail
volume before you buy.
FortiMail VM16 is licensed for a maximum of 16 virtual CPU cores, per Fortinet's
official FortiMail data sheet. It sits in the "large enterprise" recommended tier alongside VM32.
Fortinet specifies a minimum of 4 GB of RAM up to a maximum of 128 GB, and a minimum
of 250 GB of storage (used during initial OVF deployment) up to a maximum of 12 TB, depending on
mailbox count and retention needs.
VM16 supports VMware ESX/ESXi 6.0 and later, Microsoft Hyper-V Server, Citrix
XenServer, and KVM on-premises, plus AWS, Microsoft Azure, Google Cloud Platform, Oracle Cloud
Infrastructure, and Nutanix AHV in the cloud.
VM32 doubles the licensed vCPU count to 32 and roughly doubles maximum storage (24 TB
vs. 12 TB) and message throughput compared to VM16, while sharing the same memory ceiling and
supported platforms. Choose VM32 if VM16's throughput won't keep pace with your peak mail volume.
Data Loss Prevention and centralized quarantine are included at the VM16 tier.
Optional add-ons such as content disarm and reconstruction, sandboxing, impersonation analysis, and
Microsoft 365 / Google Workspace API scanning are available through Fortinet's Enterprise ATP bundle.
Ready to size your FortiMail VM16 deployment?
Our Fortinet-certified engineers can validate your mailbox count and mail flow rate to confirm VM16 is
the right license tier, then get you a same-day quote.
