Proofpoint Messaging Security Gateway
Next-generation Email Security and Data Loss Prevention

Proofpoint Messaging Security Gateway delivers the industry's most complete and effective secure messaging infrastructure for the enterprise. It combines a robust, enterprise-class MTA with perimeter security, anti-spam, anti-virus, secure messaging and outbound content security capabilities in an easy-to-deploy, hardened appliance. Proofpoint's anti-spam appliance (the P-Series appliance) is available for both large enterprises and small- and medium-sized businesses. The Proofpoint Messaging Security Gateway is also available in a Virtual Edition that offers all of the same features as Proofpoint's hardware appliances as an easy-to-deploy "virtual appliance" for VMware's virtualization products.
Benefits of Proofpoint's Email Security Appliance
- Hardware appliance combines an enterprise-class MTA and multi-protocol content (deep packet) scanning with perimeter security, anti-spam, anti-virus,
anti-phishing, multi-protocol content security, policy-based encryption and reporting features.
- "Plug and play" deployment, "set it and forget it" administration: Easy to deploy, administer and maintain.
- Dynamically control which services are enabled on each Proofpoint appliance via Proofpoint's centralized, web-based administration console.
- Variety of appliance models available to fit any size deployment.

Demo Movie: Proofpoint in Action
Features:
Defend, Prevent, Encrypt, Optimize
Why purchase yet another point solution? Proofpoint's unified email security and data loss prevention platform provides comprehensive protection against both inbound threats and outbound content security risks–and Proofpoint's modular architecture lets you easily deploy new defenses as your needs change.
All Proofpoint features—including anti-spam, anti-virus, anti-phishing, multi-protocol content security, policy-based encryption, secure file transfer and reporting features—are managed centrally from a single administrative GUI and deployed on a unified appliance architecture. Features can be deployed in nearly any configuration, to meet your organization's unique requirements.
Whether your deployment involves a single Proofpoint server or multiple, globally distributed appliances, all policy management and administration tasks are controlled via Proofpoint's centralized, web-based administration console.
Defend Against Inbound Threats
Advanced Spam Detection, Powered by Proofpoint
MLX™
Powered by patent-pending Proofpoint MLX machine
learning technology, the Proofpoint
Spam Detection™ module examines hundreds of
thousands of attributes in every email—including
message envelope headers and structure, image
properties, sender reputation data as well as
unstructured content in the body of messages—to
block the most spam, image-based (and other
forms of attachment-based) spam and phishing
attacks, while automatically adapting to new attacks
as they appear.
And the Proofpoint Dynamic Update Service™ automatically keeps your spam protection up-to-date, ensuring maximum effectiveness at all times. Individually controllable spam and adult content scores allow you to enforce zero-tolerance policies against pornographic spam. Anti-phishing features stop the spread of phish and other identity-theft attacks from stealing personal information from employees. Proofpoint also incorporates bounce management features including Bounce Address Tag Validation (BATV) specification support to block 100% of spam “backscatter” (the barrage of Non-Delivery Report messages caused when spammers spoof an organization's email addresses).
Proofpoint Spam Detection is multi-lingual and offers outstanding accuracy against spam in any language—including hard-to-analyze, multi-byte character languages such as Japanese and Chinese.
Anti-spam and anti-phishing policies can be customized at the global, group and end-user levels with full integration to LDAP or Active Directory to streamline ongoing administration.
Integrated Email Firewall Protection
The Proofpoint Email Firewall™ provides a stateful,
first line of defense against spam and malicious
connections by testing numerous connection-level
data points including DNS, MX record verification,
SPF, recipient verification, Proofpoint Dynamic
Reputation information and optional netMLX data.
Innovative Connection Management
Proofpoint Dynamic Reputation™–powered by Proofpoint
netMLX™–adds the industry's most powerful connection
management features to your Proofpoint deployment.
It's the only email reputation service that uses a
combination of local, predictive behavioral data and
globally-observed reputation–analyzed by powerful
machine learning algorithms–to block incoming
connections from malicious IP addresses.
All Proofpoint appliances and software deployments provide built-in, predictive, behavioral analysis of local IP traffic that responds in real-time to eliminate email traffic spikes caused by target attacks and to block or throttle malicious connections from botnets.
Customers with high email volumes can add the enhanced protection of Proofpoint netMLX to their deployments to reduce inbound connection volumes by a total of 80% or more. Proofpoint netMLX creates the industry's most accurate and up-to-date database of reputation for IP addresses sending email across the Internet. Each minute, hundreds of data points for all IP addresses are parsed with advanced machine learning algorithms to generate a score that represents the sender's reputation. Proofpoint Dynamic Reputation then uses these scores, combined with local behavioral data, to make intelligent decisions about accepting, throttling or rejecting incoming email connections.
Virus Protection and Zero-Hour Anti-Virus
Defenses
Through strategic partnerships with leading
anti-virus vendors, Proofpoint Virus Protection™
provides complete virus scanning functionality.
Virus engines are deeply integrated with
Proofpoint's platform, providing convenient,
centralized administration of anti-virus policies
from the same interface used to manage spam and
content policies.
Messages are efficiently scanned for viruses in parallel with spam and message content, protecting end users from viruses, worms and other malicious code. Additionally, the Proofpoint Zero-Hour Anti-Virus™ module protects against emerging viruses in the earliest stages of their proliferation–stopping them hours before competing solutions even begin to react.
Prevent Leaks of Information Across Multiple Protocols
Content Compliance: Easily Enforce Acceptable Use
Policies
Proofpoint Content Compliance™ makes it easy to
define and enforce corporate acceptable use policies
for message content and attachments. A convenient
point-and-click interface simplifies the process of
defining complex rules related to file types,
message size, and message content. These features
can be used to identify and prevent a wide variety
of inbound and outbound policy violations–including
offensive language, harassment, file sharing and
violations of external regulations.
Regulatory Compliance: Keep Private Data Secure
More than ever, enterprises need to safeguard the
privacy and security of customer and employee data.
The Proofpoint Regulatory Compliance™ module
enforces best practices for securing private data
and protects your organization from liabilities
associated with privacy and data security
regulations (such as HIPAA, GLBA, PCI, SEC rules and
others). Customizable rules, managed dictionaries
and "smart identifiers" are used to automatically
scan for non-public information–such as protected
health information and personal financial
information–and reject or encrypt messages as
appropriate. Proofpoint includes a wide variety of
commonly used US and international identifiers to
help you meet increasingly complex data protection
requirements worldwide.
Proofpoint's smart identifiers are more sophisticated than simple regular expressions. They look for the correct number of digits or characters, but also perform complex algorithmic processing to ensure high detection accuracy while minimizing false positives.
Digital Asset Security: Protect Confidential
Documents
As email, webmail and other messaging systems have
become the most important communication channels,
they've also become a conduit for the exposure of
sensitive or confidential information. The
Proofpoint Digital Asset Security™ module keeps
valuable corporate assets and confidential data from
leaking outside your organization via email and
other messaging protocols.
Powerful MLX machine learning technology analyzes and classifies your confidential documents and then monitors for that information (or parts of that information) in the outbound message stream–stopping content security breaches before they happen.
Encrypt Sensitive Information
Proofpoint Secure Messaging™ adds powerful, content-aware encryption capabilities to your Proofpoint deployment, automatically encrypting messages based on your organization's policies. It automatically and consistently applies your encryption policies, without requiring end-users to take any special actions. Voltage IBE (identity based encryption) technology provides powerful, easy-to-use encryption without the key and certificate management hassles of other solutions. Proofpoint's hardware and virtual appliances also support digital certificates and enable gateway-to-gateway secure transfer and receipt of email using Transport Layer Security (TLS).
Optimize Your Messaging Infrastructure
Extend your Proofpoint Messaging Security Gateway deployment with a variety of enhancements that improve the usability and manageability of your email infrastructure.
Proofpoint Smart Search™ enhances Proofpoint’s built-in logging and reporting features with advanced message tracing, forensics and log analysis capabilities—offering easy, real-time visibility into message flows across your entire messaging infrastructure. Search, analyze and export message logs from one convenient, easy-to-use GUI—even across globally distributed Proofpoint deployments.
Proofpoint Secure File Transfer™ adds secure, large file transfer capabilities to your Proofpoint deployment. It lets end users send large files (or files that require enhanced security) quickly and easily—while minimizing the impact of large attachments on your email infrastructure.
The on-demand Proofpoint ARCHIVE™ solution addresses email storage management, legal discovery and regulatory compliance challenges without the overhead of managing an in-house email archive.
High-performance, Easy Deployment, Optimal Scalability
The Proofpoint Messaging Security Gateway and Proofpoint Protection Server were designed to meet the unique needs of large enterprises, ISPs, universities and government organizations. They offer all of the performance, flexibility, scalability, customization and end-user control features needed in large-scale deployments.
Each and every component of the Proofpoint system is engineered to meet the rigorous demands of enterprise performance. From the hardened, messaging-optimized OS used in Proofpoint appliances, to Proofpoint's unique, queue-less architecture that allows all message scanning functions to be performed in memory, Proofpoint provides the high performance required in even the most sophisticated deployments.
Proofpoint appliances and software scale indefinitely to support many millions of messages per day. They can easily be deployed in multiple-appliance, master/agent configurations to support complex or geographically distributed data centers—offering the security of 100% redundancy combined with the convenience of a single administrative interface. Proofpoint even supports hybrid deployments such as combining on-premises appliances with our SaaS solutions (including Proofpoint Enterprise, Proofpoint Protect and Proofpoint Shield) or mixing and matching both hardware and virtual appliances.
Proofpoint's optimal scalability architecture lets you manage all agent servers from a single master console. Automatic configuration propagation, a centralized message quarantine and centralized reporting simplify maintenance and reduce total cost of ownership.
Proofpoint further reduces total cost of ownership by easily integrating with any IT infrastructure, no matter how distributed. A GUI-based LDAP command console and Microsoft Active Directory support make directory server integration easy. Proofpoint is also compatible with—and minimizes the burden on—overtaxed email server solutions such as Microsoft Exchange and Lotus Notes.
Technology:
Proofpoint MLX™ Technology
Advanced Machine Learning
The power behind Proofpoint's enterprise messaging
security solutions—Proofpoint MLX—is an advanced,
patent-pending machine learning system developed by
the scientists at the Proofpoint Attack Response
Center. Based on advanced statistical techniques
including logistic regression and information gain
analysis, Proofpoint MLX enables the accurate
classification and identification of unstructured
content, as found in email and other documents.
Unparalleled
accuracy
Proofpoint
MLX
is
the
basis
for
the
unrivalled
anti-spam
accuracy
delivered
by
the
Proofpoint
Spam
Detection
module.
Using
MLX,
Proofpoint
analyzes
hundreds
of
thousands
of
structural,
image,
content
and
reputation
attributes
to
accurately
differentiate
between
spam
and
valid
messages.
Traditional
anti-spam
solutions
evaluate
only
a
limited
number
of
attributes
and
are
unable
to
decisively
classify
spam,
leading
to
low
effectiveness
and
a
high
rate
of
false
positives.
Futureproof intelligence
Proofpoint's intelligent anti-spam technology
continually updates itself to defend against new
forms of spam. Ongoing self-training and new
techniques developed by Proofpoint scientists allow
MLX to predict and adapt to new forms of spam as
they appear. MLX updates are automatically delivered
to all customers several times per day.
As a result, Proofpoint MLX offers effectiveness of 99.8% and higher–even against the most difficult forms of spam including image-based, PDF, attachment, “backscatter” and foreign language spam. View a real-time chart of Proofpoint's anti-spam effectiveness for the last 190 days ยป
Unlike other anti-spam solutions, Proofpoint's ability to defend against spam attacks does not degrade over time–and updates to the MLX anti-spam engine are automatically delivered to your enterprise on a regular basis. Proofpoint MLX is constantly evolving to counter emerging threats, ensuring that your messaging infrastructure is secure against tomorrow's spammers as well as today's.
Proofpoint MLX also powers the advanced content security features of the Proofpoint Digital Asset Security module and the intelligent perimeter security features of the Proofpoint Email Firewall and Dynamic Reputation service. Proofpoint is the only vendor to apply these powerful machine learning techniques to email security and data loss prevention.
Proofpoint Messaging Security Console™
Unified Policy Management, Administration and
End-user Controls
The Proofpoint Messaging Security Console provides a
centralized, 100% web-based administration interface
to Proofpoint's unified policy management framework,
ensuring consistent application of corporate
messaging policies. The Console makes it easy to
monitor and control your messaging infrastructure
and define messaging policies. You can even define
and enforce different policies for different groups
of end-users. As additional Proofpoint modules are
added to your deployment, the same convenient
interface is used for policy management.
The Ajax-based interface gives you "drag and drop" customization of the reports, status information, RSS feeds and other components displayed. Even create "mashups" of information from external sources.
Proofpoint's outstanding ease-of-use extends to end-users as well. Easy-to-understand reports and controls, such as Proofpoint's end-user digest, web-based quarantine and personalized safe- and block-lists, give users complete control over their own spam preferences.
Robust Reporting
The Console also provides access to more than 60
real-time, graphical reports and alerts that give
total visibility into the state of your enterprise
messaging system. Reports can be easily emailed or
posted as HTML/XML. Proofpoint's "active" reports
deliver key information, but also allow
administrators to take immediate action (e.g.,
simply click a link to block an abusive sender).
Proofpoint Speaks Your Language
In addition to delivering outstanding anti-spam
performance against spam in any language,
Proofpoint’s policy and content scanning engines
detect and “understand” text in any language,
including multi-byte languages. Data loss prevention
policies can match non-English keywords and
dictionary terms written in international character
sets including Japanese, Chinese and Cyrillic.
Administrators can create policies that are
triggered based on the language detected in the
content of an email. For example, attach
language-specific disclaimers to an outbound message
depending upon the language in which it was written.
End-user interfaces for message digests, and web-based quarantine are available in Chinese, Dutch, English, German, Finnish, French, Italian, Japanese, Portuguese, Russian, Spanish and Swedish.
Proofpoint’s administrative GUI, product documentation and online help are currently available in both English and Japanese versions. As with Proofpoint’s end-user interfaces, administrators can set their language preferences on an individual basis.
Proofpoint Dynamic Update Service™
Always up-to-date protection, maximum ease-of-administration
Automatic installation and notification of updated
components makes ongoing administration simple. The
Proofpoint Dynamic Update Service ensures that your
network always has the highest level of protection
from message-borne threats. It provides continuous
updates for every component of your Proofpoint
software or appliance deployment, including the
hardened operating system and MTA, spam and virus
engines, lexicons (such as the dictionaries used by
the Proofpoint Regulatory Compliance module),
application components and customized hot fixes.
Compare:
Current Appliance Models
To fit any size organization, Proofpoint's
enterprise-ready P-Series appliance, is available in
four models–the P600, P820, P825 and P825M–and is
compatible with any email solution.
| Model P640 Gateway | Model P840/845 Gateways | Model P845M Gateway | |
|---|---|---|---|
| Rack units | 1 | 1 | 2 |
| Processors | 1x Quad-Core Intel Xeon | 1x Quad-Core Intel Xeon 2x Quad-Core Intel Xeon |
2x Quad-Core Intel Xeon |
| Memory | 4GB | 4GB/8GB | 8GB |
| Disks | 2 hotswappable 146GB RAID1 with battery-backed cache | 2 hotswappable 146GB RAID1 with battery-backed cache | 6 hotswappable 300GB RAID10 with battery-backed cache |
| Network | 2x Gigabit BaseT | 2x Gigabit BaseT | 2x Gigabit BaseT |
| Power supplies | Dual hot-plug redundant; 670 watts, 100/240 volts | Dual hot-plug redundant; 670 watts, 100/240 volts | Dual hot-plug redundant; 750 watts, 100/240 volts |
| Drives | 1.44MB diskette drive DVD-ROM |
1.44MB diskette drive DVD-ROM |
1.44MB diskette drive DVD-ROM |
| Administration | Web-based | Web-based | Web-based |
| Platform | Secure
performance-optimized Linux-based
runtime environment
Locked-down services and ports Controlled user access |
Secure
performance-optimized Linux-based
runtime environment
Locked-down services and ports Controlled user access |
Secure
performance-optimized Linux-based
runtime environment
Locked-down services and ports Controlled user access |
| Performance* | Over 65,000 messages/hour* | Over 150,000
messages/hour*/ Over 200,000 messages/hour* |
Over 150,000 messages/hour* |
* Performance measurements based on Proofpoint lab testing simulating typical deployment environments with all modules installed. Maximum performance may vary in field deployments.
Flexible Deployment Options
Proofpoint's email security and data loss prevention
solutions are offered in a variety of form factors
for maximum deployment flexibility:
- Hardware appliance: The Proofpoint Messaging Security Gateway is a hardened, secure, easy-to-deploy appliance that installs in minutes. A variety of appliance models are available to support enterprises of any size.
- Virtual appliance: The Proofpoint Messaging Security Gateway–Virtual Edition delivers the same best-in-class protection as Proofpoint's hardware appliances, combined with the many benefits of virtualization–including
cost savings, rapid deployment and provisioning, simplified change management and easy backup and disaster recovery. The virtual appliance runs on any standard x86 desktop or server using VMware Server or VMware Infrastructure.
- Software: The Proofpoint Protection Server delivers Proofpoint's messaging security platform as software for the Red Hat Enterprise Linux operating system.
- On-demand service: Proofpoint email security and DLP features are also available as a hosted service, Proofpoint ENTERPRISE, or through Proofpoint’s global network of managed service providers.
Diagram:
Proofpoint Next-Generation Hosting Architecture

Screenshots:
Click on a thumbnail to see that picture in full size!
Documentation:
![]()
Download the Proofpoint Messaging Security Gateway Datasheet (PDF).





