Relaxcloud Launches Advanced Email Attack Detection System with Network-Wide Immunity

The Advanced Email Attack Detection and Analysis System adopts an innovative "One Phished, All Immunized" protection concept, combining AI semantic analysis and real-time threat intelligence sharing technology to build a comprehensive email security protection system for enterprises.

Addressing Severe Email Security Threats

According to attack-defense exercise statistics, 90% of network intrusions originate from phishing emails. Urgent notices disguised as executives, year-end bonus inquiries from HR, system upgrade links from IT departments — these carefully designed social engineering attack emails feature "precise delivery, strong disguise, extreme inducement, and high credibility." Even employees with the strongest security awareness cannot guarantee they won't click. For attackers, just one person clicking is enough.

"Traditional email security solutions fight their own battles, and the same attack may succeed repeatedly across different organizations," said Relaxcloud's product manager. "Our new system breaks this pattern by enabling real-time threat intelligence sharing — when one organization detects a threat, the entire industry becomes immune immediately."

Core Technical Innovations

One Phished, All Immunized

The greatest innovation of the Advanced Email Attack Detection and Analysis System lies in establishing an industry-level threat intelligence sharing mechanism. When any node in the system detects a phishing email, threat characteristics are shared in real-time to all nodes, enabling network-wide immunity immediately. The system maintains millions of malicious sender addresses, URLs, and sample signatures daily, supporting industry-level and cross-industry real-time threat intelligence sharing.

AI Understanding Attacker Psychology

Unlike traditional keyword matching and blacklist filtering, this system employs AI semantic analysis technology, conducting multi-dimensional analysis from word level, sentence level, paragraph level to business modeling level. Combined with deep learning and Chinese word segmentation technology, the system can understand attacker psychology, identify attack intentions, and profile attackers.

The system has nearly 100 built-in phishing attack detection models, constructed based on deep analysis of phishing tactics from years of attack-defense exercises and real cases. Real-time detection across multiple dimensions including body text, attachments, URLs, email headers, and sender behavior can effectively identify hidden/transformed URLs, shortcut attacks, PowerShell scripts, QR code phishing, identity spoofing, and other advanced social engineering attacks.

Remote Browser Isolation Technology

To address malicious URL click risks, the system innovatively adopts remote browser isolation technology. When users click suspicious links, the URL opens in a remote virtual browser, and the local browser only receives safe visual encoding without executing any dynamic scripts, completely blocking malicious scripts, credential phishing, and drive-by downloads.

Precise Tracing and Historical Retrospection

The system not only intercepts threats but also enables precise tracing. After detecting phishing emails, the system automatically initiates tracing analysis, correlating intelligence from multiple dimensions including sender information, sender IP addresses, attachment hash values, URL link characteristics, and sending tool fingerprints, cross-analyzing historical attack behaviors, and combining cyberspace mapping technology to comprehensively profile attackers.

Notably, the system has historical retrospection capability. After new intelligence is added to the database, the system automatically polls and retrospects historical emails, using incremental update technology to correlate and analyze past emails — "threat characteristics discovered today can catch yesterday's escapees."

Flexible Deployment, Precise Defense

The Advanced Email Attack Detection and Analysis System supports multiple deployment modes:

• Inline Deployment (MTA Inline): Active protection, real-time blocking of malicious emails
• Bypass Deployment (Mirror/BCC): No impact on existing email systems, rapid warning of compromise events
• Email Archiving Mode: Supports compliance auditing and historical email retrospective analysis

For threat handling, the system combines automation with manual judgment: high-confidence threats are automatically intercepted, medium-confidence threat warnings are reported for security team judgment, and low-confidence threats are continuously observed to accumulate intelligence.

Market Prospects

"Email remains one of the most important communication tools for enterprises and is also the most commonly exploited entry point by attackers," commented industry security experts. "Relaxcloud's new system elevates individual defense to collective immunity through threat intelligence sharing and AI analysis, representing an important innovation in the email security field."

The Advanced Email Attack Detection and Analysis System is now officially launched, providing services to key industries including finance, government, healthcare, education, and energy.

Media Contact Beijing Relaxcloud Information Technology Co., Ltd. Email: lysk@relaxcloud.cn