Description

The Fortinet FML-VM04 delivers the FortiMail email-security platform as a flexible virtual appliance, allowing organizations to deploy advanced email protection within their existing virtualized or cloud infrastructure.

With a licensed capacity of 4 virtual CPU cores, VM04 provides substantially greater processing capacity than the VM01 and VM02 configurations. Fortinet positions the VM04 platform for large-enterprise organizations, making it suitable for demanding email-security environments and higher-volume mail gateways.

FortiMail is designed to provide a dedicated security layer for email infrastructure, helping organizations protect inbound and outbound email against spam, malware, phishing, malicious content, and other email-based threats.

---

Key Features

• Brand: Fortinet
• Product Family: FortiMail
• Model: FortiMail-VM04
• SKU: FML-VM04
• Product Type: Virtual Email Security Appliance
• Maximum vCPU: 4
• Virtual NICs: 1–6
• Virtual Memory: 4–16 GB
• Virtual Storage: 250 GB–4 TB
• Recommended Deployment: Large enterprise
• Deployment: Virtualized / Cloud
• Physical Hardware: Not included
• Email Security: Yes
• Scalable VM Architecture: Yes

Fortinet’s current FortiMail data sheet specifies 4 maximum virtual CPUs, 1–6 virtual NICs, 250 GB–4 TB storage, and 4–16 GB virtual memory for VM04.

---

Enterprise Email Security

FML-VM04 provides a virtualized platform for securing organizational email infrastructure without requiring a dedicated physical FortiMail appliance.

It can be deployed as part of a virtual data center, private-cloud environment, or supported public-cloud infrastructure.

Typical applications include:

• Enterprise email gateways
• Corporate mail infrastructure
• Large virtualized data centers
• Private cloud deployments
• Public cloud deployments
• Centralized email-security environments
• High-volume email processing

---

Advanced Email Threat Protection

FortiMail provides multiple layers of email security designed to help organizations identify and block malicious or unwanted messages.

Depending on the installed license and FortiGuard subscriptions, capabilities can include:

• Antispam protection
• Antivirus and malware scanning
• Phishing protection
• Malicious URL detection
• Malicious attachment inspection
• Email filtering
• Email quarantine
• Data Loss Prevention
• Advanced threat protection
• Email authentication
• Security policy enforcement

The availability of specific advanced services depends on the FortiMail license and applicable FortiGuard subscriptions.

---

Antispam Protection

FortiMail can inspect incoming and outgoing email traffic to identify unwanted or suspicious messages.

Antispam technologies can help protect organizations against:

• Bulk spam
• Unwanted commercial email
• Spam campaigns
• Suspicious senders
• Malicious email campaigns
• Email-based social engineering

When combined with applicable FortiGuard services, FortiMail can use continuously updated security intelligence to improve protection against evolving email threats.

---

Antivirus & Malware Protection

FortiMail provides email and attachment inspection designed to detect malicious content before it reaches the intended recipient.

This can help protect against malware distributed through:

• Email attachments
• Malicious documents
• Executable files
• Infected messages
• Other email-borne malicious content

Organizations can apply security policies to control how potentially dangerous messages are handled.

---

Phishing Protection

Phishing emails can attempt to steal credentials, distribute malware, or trick users into performing unauthorized actions.

FortiMail provides security controls designed to help identify and mitigate suspicious email traffic.

This can help organizations reduce exposure to:

• Credential theft
• Malicious links
• Impersonation attempts
• Fraudulent email
• Targeted phishing
• Business Email Compromise

---

Data Loss Prevention

FortiMail supports Data Loss Prevention (DLP) capabilities on supported VM configurations, including VM04.

DLP policies can help organizations identify and control email containing sensitive information.

Potential applications include:

• Confidential business documents
• Customer information
• Financial information
• Corporate records
• Sensitive intellectual property

Fortinet’s current data sheet indicates DLP support for VM04 and higher FortiMail VM configurations.

---

Centralized Quarantine

VM04 supports centralized quarantine, allowing administrators to manage suspicious or unwanted email from a centralized location.

Quarantine management can help administrators:

• Review suspicious messages
• Release legitimate messages
• Remove unwanted email
• Investigate email-security events
• Apply organizational email policies

Fortinet lists centralized quarantine as supported on VM04 and the higher FortiMail VM tiers.

---

4 vCPU Processing Capacity

The defining characteristic of FML-VM04 is its 4-vCPU licensed capacity.

Fortinet’s current FortiMail VM specifications list:

This provides a clear upgrade path as email-processing requirements increase.

---

Virtual Machine Memory

FML-VM04 supports 4 GB to 16 GB of virtual memory, with 16 GB being the maximum specified for this configuration.

The amount of memory allocated should be selected according to the FortiMail software release, expected email traffic, enabled security services, and overall deployment requirements.

---

Virtual Storage

Fortinet specifies 250 GB to 4 TB of virtual storage for VM04.

Virtual storage can support FortiMail system requirements and data such as:

• System files
• Security logs
• Quarantined messages
• Configuration information
• Email-security data

Fortinet notes that 250 GB is required for the initial VM installation using the default OVF, after which the disk can be adjusted according to the documented minimum requirements.

---

Virtual Network Interfaces

FML-VM04 supports between 1 and 6 virtual network interfaces.

This allows organizations to create flexible network designs for:

• Management traffic
• Internal mail servers
• Internet connectivity
• DMZ networks
• Separate security zones
• Dedicated mail-processing interfaces

The actual interface configuration depends on the organization’s network topology.

---

Supported Virtualization & Cloud Platforms

Fortinet’s FortiMail VM data sheet lists support for several virtualization and cloud environments, including:

• VMware ESX/ESXi
• Citrix XenServer
• Microsoft Hyper-V
• KVM
• Amazon Web Services (AWS)
• Nutanix AHV
• Microsoft Azure
• Google Cloud Platform
• Oracle Cloud Infrastructure

Supported versions can vary depending on the FortiMail software release, so compatibility should be verified before deployment.

---

Email Processing Performance

Fortinet publishes indicative performance figures for FortiMail VM configurations.

For VM04, the published figures include approximately:

These are indicative figures based on Fortinet’s specified test environment and a 100 KB message size. Actual performance varies depending on hardware, configuration, traffic patterns, message size, enabled security features, and other factors.

---

Protected Email Domains

Fortinet’s current data sheet specifies that the VM04 platform can support up to 500 protected email domains.

This makes the platform suitable for organizations operating multiple email domains or larger distributed email environments.

---

Microsoft 365 & Google Workspace Integration

FortiMail supports integration with cloud-based email platforms such as Microsoft 365 and Google Workspace through email API capabilities, subject to the applicable FortiMail version and licensing.

Fortinet lists Microsoft 365 and Google G Suite email API integration as an optional capability for VM04 and higher configurations.

---

Scalability

FortiMail-VM uses a tiered virtual-appliance model.

Organizations can scale through the following configurations:

VM01 → 1 vCPU
VM02 → 2 vCPUs
VM04 → 4 vCPUs
VM08 → 8 vCPUs
VM16 → 16 vCPUs
VM32 → 32 vCPUs

This allows customers to select a virtual appliance appropriate for their current email volume and upgrade to larger configurations as requirements grow.

---

Ideal Applications

Large Enterprise Organizations

VM04 is designed for larger organizations requiring a scalable email-security platform.

Enterprise Email Gateways

Suitable for organizations processing significant inbound and outbound email traffic.

Virtualized Data Centers

Provides email security without requiring dedicated physical FortiMail hardware.

Private Cloud

Can be integrated into supported private-cloud infrastructure.

Public Cloud

Can be deployed in supported cloud environments such as AWS, Azure, Google Cloud, and Oracle Cloud Infrastructure.

Multi-Domain Email Environments

The ability to protect up to 500 email domains makes VM04 suitable for organizations with multiple domains.

---

Key Benefits

4 vCPU Architecture

Provides up to 4 licensed virtual CPU cores for higher email-processing capacity.

Up to 16 GB RAM

Supports up to 16 GB virtual memory.

Up to 4 TB Storage

Provides substantial storage capacity for enterprise deployments.

Up to 6 Network Interfaces

Supports flexible network segmentation and deployment architectures.

Enterprise-Grade Email Protection

Provides a platform for antispam, antivirus, phishing protection, DLP, quarantine, and advanced threat protection.

Virtual Deployment

Runs on supported virtualization and cloud platforms without requiring dedicated physical hardware.

High Email Processing Capacity

Fortinet publishes up to 306,000 email-routing messages/hour for VM04 under its specified test conditions.

Scalable Platform

Organizations can move to higher VM configurations when additional processing capacity is required.

---

Technical Specifications

*Performance figures are indicative and based on Fortinet’s specified test environment and 100 KB message size; actual performance varies by deployment.

---

What’s Included

The FML-VM04 product represents:

• FortiMail-VM04 virtual appliance/license
• 4-vCPU licensed configuration
• Virtual deployment capability
• Support for up to 6 virtual network interfaces
• Virtual memory and storage capacity according to the VM04 specification

No physical FortiMail appliance is included.

FortiGuard security services and FortiCare support should be specified separately unless they are included in the particular license or service bundle being sold.

---

Important Licensing Note

FortiMail-VM resources are controlled by the applicable license. The virtual machine should be configured according to the licensed CPU capacity and the requirements of the specific FortiMail software release.

For FML-VM04, the licensed maximum is 4 virtual CPU cores. Fortinet recommends validating the appropriate model against expected peak email traffic and average message size when sizing a FortiMail deployment.

---

Product Summary

Fortinet FML-VM04 FortiMail-VM is a powerful virtual email-security appliance designed for large enterprise environments. With 4 vCPUs, up to 16 GB RAM, up to 4 TB virtual storage, and up to 6 virtual network interfaces, it provides the processing capacity and flexibility needed for demanding email-security deployments.

The platform supports advanced FortiMail capabilities such as antispam, antivirus, phishing protection, centralized quarantine, Data Loss Prevention, and FortiGuard-based threat protection, subject to the applicable license and subscriptions.