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Email Attachment Protection

Dangerous Attachments.Automatically Sanitized.Safely Delivered.

Content Disarm & Reconstruction (CDR) removes macros, embedded malware, and hidden threats from email attachments before they reach your network.

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Email Attachment Protection with Content Disarm and Reconstruction

Traditional antivirus solutions only detect known threats. Conbool MailGuard uses CDR technology to proactively remove malicious content from file attachments without relying on signatures or heuristics. Every file is deconstructed, sanitized, and securely reconstructed.

Threats from Email Attachments

Malicious Macros

Macros in Office documents are one of the most common entry points for cyberattacks. Attackers use VBA macros to execute malicious code as soon as a document is opened, often without the recipient's knowledge.

Embedded Malware

Malware can be deeply embedded in file formats such as PDF, DOCX, or XLSX. These threats frequently bypass signature-based scanners and only become active when the file is opened on the target system.

Archive Bombs & Nested Archives

Compressed files with extreme nesting or enormous decompression sizes can overwhelm security systems. Attackers hide malware in ZIP-within-ZIP structures that many scanners cannot fully analyze.

Conbool MailGuard CDR Features

Comprehensive protection through file-based threat defense, from analysis to secure delivery.

CDR Engine

Our Content Disarm & Reconstruction engine deconstructs every file into its components, removes potentially harmful elements, and reconstructs a safe version without compromising file usability.

Deep File Inspection

In-depth analysis of file structures detects hidden threats, embedded objects, and anomalies that conventional scanners miss. Every layer of a document is examined.

Macro Removal

VBA macros, ActiveX controls, and embedded scripts are automatically removed from Office documents. The visible content of the document remains fully intact.

Clean File Delivery

After sanitization, a safe, functional version of the file is delivered to the recipient. Formatting, images, and text content remain unchanged. Only the threat is removed.

Multi-Format Support

Support for over 100 file formats: Office documents (DOCX, XLSX, PPTX), PDFs, images, archives (ZIP, RAR, 7z), and many more. Each format is analyzed and sanitized format-specifically.

Real-Time Processing

The entire CDR process runs in real time with no noticeable delay in email delivery. Employees receive sanitized attachments within seconds.

Why Antivirus Alone Is Not Enough

Signature-based scanners only detect known threats. CDR technology provides proactive protection, even against zero-day attacks and unknown malware.

Proactive Instead of Reactive

CDR does not wait for signature updates. Every file is sanitized regardless of known threat databases, providing zero-day protection from day one.

No False Negatives

While signature-based scanners can miss new malware variants, CDR fundamentally removes all active content. What is not in the file cannot cause damage.

File Functionality Preserved

Unlike restrictive blocking rules, CDR delivers a usable file. Formatting, text, and images remain intact. Only potentially harmful elements are removed.

Protection Against Obfuscated Attacks

Attackers disguise malware through obfuscation, encryption, and nested archives. CDR deconstructs every file down to the component level and eliminates hidden threats.

FAQ

What is Content Disarm and Reconstruction (CDR)?
CDR is a security technology that deconstructs files into their basic components, removes potentially harmful elements such as macros, embedded scripts, and active content, and then securely reconstructs the file. Unlike signature-based antivirus, CDR also protects against unknown and zero-day threats.
Which file types does Conbool MailGuard CDR support?
Conbool MailGuard CDR supports over 100 file formats, including Microsoft Office (DOCX, XLSX, PPTX), PDFs, image files (JPG, PNG, BMP), archives (ZIP, RAR, 7z, TAR), and many more. Support is continuously expanded to cover new file formats.
Does CDR damage or alter sanitized files?
No. Conbool MailGuard's CDR technology is designed to remove only potentially harmful elements. The visible content, including text, formatting, images, and layouts, remains fully preserved. Recipients receive a functional, safe file.
How fast is CDR processing?
Processing occurs in real time and typically takes only a few seconds per file. Emails with attachments are delivered without noticeable delay, ensuring your employees' workflow is not disrupted.
Can CDR process encrypted or password-protected attachments?
Password-protected archives and encrypted files cannot be directly processed by CDR since the content is inaccessible. Conbool MailGuard offers configurable policies for such cases: files can be quarantined, blocked, or delivered to the recipient with a warning.
Does CDR replace our existing antivirus protection?
CDR optimally complements your existing antivirus protection. While signature-based scanners detect known threats, CDR proactively protects against unknown malware and zero-day attacks. Conbool MailGuard combines both approaches for maximum protection: CDR, sandbox analysis, and multi-engine scanning work together.

Secure your email attachments — with Conbool MailGuard

Protect your business from file-based threats. Try Content Disarm & Reconstruction for free and experience how CDR takes your email security to the next level.

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