MetaDefender Email Gateway Security

Deliver trust to your inbox

Most malware is initiated through email. Links and attachments that appear safe can contain malicious content. Once accessed, malware replicates and spreads across the network. 

MetaDefender Email Gateway Security examines every email and attachment, scans malicious content, reconstructs suspicious attachments and redacts sensitive data before it’s delivered.

Advanced threats can bypass many malware detection applications used by email security solutions today. 

MetaDefender Email Gateway Security – without affecting employee productivity – provides a value-added layer to legacy email gateways, neutralizes over 99% of malware in emails.


Neutralize Malicious Emails & Attachments

Our Zero-Day malware prevention technology, also known as Deep Content Disarm and Reconstruction, ‘disarms’ each email body & attachment by removing all potentially malicious content – even if encrypted. The reconstructed, fully usable email attachments are delivered to isolated storage or sent to the user’s mailbox.

Protect Personally Identifiable Information (PII)

MetaDefender Email Gateway Security offers proactive data loss prevention (Proactive DLP) to prevent emails with sensitive content leaving or entering the organization by content-checking the email body and attachments for credit card numbers, social security numbers, and content that matches custom regular expressions.

Detect More Email Malware

By Advanced threat prevention technology, emails with 30+ anti-malware engines using signatures, heuristics and machine learning, MetaDefender Email Gateway Security significantly improves detection of known and unknown threats and provides the earliest protection against malware outbreaks.

Dynamic Antiphishing

MetaDefender Email Gateway Security has included Static and Dynamic Antiphishing technologies at the highest tier to expose and deactivate all potentially malicious links in an email. Hyperlinks to unsafe URLs are replaced with plain text or redirected to reputation checks to prevent user misbehavior.

High Performance

MetaDefender Email Gateway Security offers fast scanning without affecting email performance and is scalable to any email volume with MetaDefender's built-in high-performance architecture and load balancing

Secure Retrieval of Attachment for Outbreak Prevention

Attachments delivered automatically to users’ isolated MetaDefender Vault for continuous malware scanning and outbreak prevention. Files released upon supervisor approval.

"We use OPSWAT’s MetaDefender as one of the tools in our arsenal that protects our email users against advanced malware threats. We’ve been using the product for many years now. OPSWAT’s multi-engine scanning technology is fast, easy to integrate, and has been highly effective in our pursuit of offering the best security available to our customers. OPSWAT has been a great company to work with and I highly recommend them."

Chris Cain

VP of New Technologies, AppRiver

Explains how AppRiver uses MetaDefender to protect their email users against advanced threats


Zero-Day malware prevention (Deep CDR for attachments)

Sanitize over 85 common file types, and rebuild each attachment ensuring safe content and full usability.

Advanced threat prevention (Multiscanning)

Each email is analyzed with 30+ anti-malware engines using signatures, heuristics, and machine learning technologies for the highest and earliest detection of known and unknown threats.

Proactive antiphishing (Dynamic and Static)

To uncover potential phishing attacks, embedded hyperlinks are replaced by actual plain-text URLs or re-routed through for a reputation check.

Prevent sensitive data loss (Proactive DLP)

Content-check the email headers, body and attachments for sensitive information before they are transferred.

Customizable Email Processing

Create a workflow between the Deep CDR and multiscanning actions to specify the order and process in which emails are handled.

Comprehensive Inspection & Remediation

The entire email is processed: header, body, and attachments—even if encrypted.

Role Based Configuration

Customizable administrative options, including Active Directory or LDAP group-based roles.

Quarantine Emails

Block or quarantine emails, with real-time threat monitoring.

Disarm Password Protected Files (Deep CDR for attachments)

The most convenient solution for encrypted attachments. Recipient required to provide decryption password so that Deep CDR and Multiscanning are applied.

Inbound & Outbound

Preventive and protective controls are applied to all received and sent emails. It is common practice to use Deep CDR to sanitize inbound mails, while for outbound Proactive DLP is highly recommended to protect PII.


All integration offers a proper second line of defense for the email flow of the company. While all Email Gateway Security offers zero-day malware prevention technologies by default, certain versions of the bundles have integrated Multiscanning to enable enterprises to gain a critical level of protection. Thus end-users only receive attachments that have been scanned and remediated, no harmful files are delivered.

Transport Agent

When Microsoft Exchange Server available, emails are delivered through Transport Agent.


Used for communication purposes between MetaDefender Email Gateway Security and the mail server.


In cases of other email gateway availability (not Exchange), emails are delivered through SMTP.

Optional Vault integration

Available to upload attachments to users’ own secure storage for continuous malware scanning and outbreak prevention, released upon supervisor approval.

Email Gateway Security Packages

Features CDR Basic Standard Premium
Advanced threat prevention 
1 engine
4 engines
ClamAV, AhnLab, Avira, Kaspersky
8 engines
ClamAV, AhnLab, Avira, ESET, Bitdefender, QuickHeal, Total Defense, Vir.IT eXplorer
20 engines
ClamAV, AhnLab, Avira, ESET, Bitdefender, QuickHeal, Total Defense, Vir.IT eXplorer, TACHYON, Cyren, K7, Ikarus, Kaspersky, Emsisoft, VirusBlokAda, Zillya, McAfee, NANO, Antiy, Sophos
Inbound and outbound emails
Central management
of multiple deployments
Deep CDR for attachments
Zero-Day malware prevention
Safe URL Redirection
Dynamic Antiphishing
Customizable Email Disclaimers
Disarm password-protected attachments
Proactive DLP
Prevent sensitive data loss
Throughput Performance*240,000

*Results on the minimum required hardware (available in the datasheet), may vary in actual deployment.