Facing the scenario of millions of enterprise users and billions of daily email interactions, NetEase Enterprise Email can achieve stable operation and fast transmission 24/7, thanks to its independently developed matrix distributed architecture. This architecture integrates core technologies such as large-scale matrix server deployment, discrete distributed storage, intelligent routing scheduling, and elastic expansion. It relies on NetEase's self built national backbone network data center and has the characteristics of high availability, high concurrency, high throughput, and low latency. After 20 years of experience in email operation and maintenance, it can support large-scale user loads with a service availability of up to 99.99%, achieving an enterprise level email service experience of "no lag, no loss, no delay", and adapting to the full scenario usage needs of small and medium-sized enterprises to large groups.

The core support of matrix based distributed high availability architecture is multi node redundant deployment and disaster recovery guarantee technology. NetEase Enterprise Email adopts a large-scale matrix distributed server architecture, deploying thousands of servers in the three core regions of North China, East China, and South China, covering mainstream operator networks such as China Telecom, China Unicom, and China Mobile. It achieves redundant backup for multiple regions and operators. When a node fails, the backup node can take over the business in seconds, achieving "single point failure does not affect the overall situation" and completely eliminating the risk of service interruption. At the same time, the architecture adopts a multi million yuan disaster recovery level redundant configuration, establishes a high-intensity backup mechanism, and synchronously backs up email data to multiple data centers. Even in the event of extreme failures, data and services can be quickly restored to ensure that enterprise email communication is not affected. The server adopts a dedicated operating system, shuts down all redundant modules and services, and only retains the email core service. The internal and external network isolation design reduces intrusion risks from the architecture level and improves system stability.

Intelligent routing and transmission optimization technology achieve global email speed and efficient transmission, solving the problem of cross regional and cross operator email transmission. In response to the network differences among different domestic operators and the complexity of international network links, NetEase Enterprise Email has built a transmission system that combines intelligent DNS scheduling and multi link redundancy. It can detect the network environment and link quality of the sender and receiver in real time, automatically select the optimal transmission path, and avoid network congestion and link interruption. In a common 10M bandwidth environment, the transmission time of 50MB attachments does not exceed 7 seconds, and the transmission efficiency is improved by more than 40% compared to similar products; For international email transmission, relying on NetEase's overseas nodes and high-quality international links, significantly reducing returns and delays. At the same time, through NetEase's global email reputation guarantee mechanism, it can quickly handle the situation where the server is blacklisted by international anti spam organizations, ensuring smooth international email delivery and meeting the cross regional communication needs of foreign trade enterprises and multinational companies. In addition, the system supports email priority setting, and core business emails can be prioritized for transmission to ensure timely delivery of important information.

Optimizing storage architecture provides a dual guarantee of "large capacity+high efficiency", completely solving the problem of enterprise email storage and access. NetEase Enterprise Email adopts a discrete distributed encrypted storage architecture to classify and store email data and attachment data, achieving secure isolation and efficient access to data; At the same time, it supports massive storage for a single account. The basic version has a single account capacity of up to 50GB, and the paid version can be expanded to over 100GB according to enterprise needs. With a 32GB file transfer station, a single email can send 2GB large attachments, and the total attachment volume can exceed 34GB at once, meeting the needs of enterprise file transmission and data accumulation. The system adopts a layered storage strategy, with commonly used emails stored on high-performance SSD disks, increasing access speed by over 60%. Historical emails are automatically migrated to high-capacity storage nodes, balancing storage capacity and access efficiency; All attachments are stored encrypted and support online preview and batch download, greatly improving user experience and reducing storage resource waste.

The high concurrency processing capability relies on multi-layer load balancing and elastic scaling technology, which can easily cope with sudden traffic shocks. The system adopts a multi-layer load balancing architecture of "access layer application layer data layer" to evenly distribute massive user requests to different nodes, avoiding single node overload; At the same time, it supports intelligent elastic expansion, which can automatically adjust server resources according to the peak of email sending and user growth rate, cope with sudden traffic such as holiday mass notifications and large conference emails, and ensure service stability does not decrease. In addition, the architecture is equipped with a 7X24 hour real-time monitoring system, which can monitor the resource usage, port status, and email transmission of each node in real time. Once an abnormality is detected, an alarm will be triggered immediately, and NetEase's professional operation and maintenance team will quickly respond and handle it. Based on 20 years of professional email operation and maintenance experience, we provide reliable email service support for enterprises to ensure the continuous and stable operation of the architecture.