In the current era of normalized digital office and highlighted value of enterprise data, the security protection capability of enterprise email, as the core carrier of business communication and data transmission, directly determines the security boundary of enterprise information assets. Relying on the technical precipitation of Alibaba Cloud Apsara Cloud platform, Alibaba Enterprise Mailbox shares Alipay's trillion financial level security system, builds a three-dimensional protection matrix covering the full link of "account transmission storage content compliance", realizes 7X24 hour all-round monitoring, forms a closed-loop security mechanism of "defense in advance, interception in the event, and tracing after the event", provides high strength security guarantee for more than 2 million enterprises, and adapts to the high security demand scenarios of finance, government affairs, the Internet and other industries.

As the first line of defense for account security, Alibaba Enterprise Email adopts a multi-dimensional risk control and refined management model to prevent the risk of account theft from the source. The system has three core capabilities: collision avoidance library, brute force cracking interception, and weak password scanning. It can automatically identify high-risk behaviors such as high-frequency password attempts and abnormal IP login, intercept suspicious operations in real time, and trigger remote login reminders; Simultaneously supporting complex password policy configuration, forcing employees to set passwords of at least 8 characters including uppercase and lowercase letters, numbers, and symbols, regularly reminding password changes, and compressing risk vulnerabilities from the source of the account. In addition, the system supports multiple verification methods such as dual authentication, client security passwords, and confidential email encryption. Employees can complete secondary login through DingTalk scanning, SMS verification, and other methods. Administrators can set IP whitelists and login time period restrictions to achieve refined control of account access. After the DingTalk account of departing employees is frozen, the email account will be synchronously invalidated, forming a closed loop of account lifecycle security management.

In terms of email content and transmission protection, Alibaba Enterprise Email has created a four fold protection system of "anti counterfeiting, anti garbage, anti-virus, and anti leakage" to accurately resist various network threats. In response to the common problem of phishing email fraud in enterprise email, the system has three free security tools built-in: SPF, DKIM, and DMARC. The three tools work together to intercept more than 90% of phishing emails. SPF restricts only Alibaba servers to send emails in the name of the enterprise, DKIM adds a special "electronic anti-counterfeiting seal" to each email, and DMARC sets suspicious email processing rules and pushes phishing warnings to completely prevent scammers from impersonating enterprises to send emails, defrauding money, and leaking information risks. The AI anti spam system relies on Alibaba Cloud's massive threat sample data and uses deep learning semantic analysis technology to achieve a spam interception rate of up to 99% and a misjudgment rate of less than 0.005%; The third-party authoritative antivirus engine updates the virus database in real-time, accurately identifying malicious attachments and phishing links, immediately intercepting suspicious content and reminding administrators. At the same time, SSL encryption is mandatory for email data transmission, and encrypted storage is used for disk data to ensure data security throughout the transmission and storage process.

In terms of compliance and data retention, Alibaba Enterprise Email has passed multiple international and domestic authoritative certifications such as the National Information Security Level 3 Certification and ISO/IEC27001, fully complying with compliance requirements such as the Cybersecurity Law and the Personal Information Protection Law. Email data is stored in a distributed multi replica redundant manner, relying on the high reliability of the Feitian Cloud platform. Mistakenly deleted emails can be fully recovered within 30 days, with zero data loss; The cloud email archiving function can automatically retain all incoming and outgoing emails, support quick retrieval by keywords, senders, and time ranges, meet the needs of enterprise auditing and traceability, and integrate security risk control log auditing into operation and maintenance operations. All violations can be traced, providing solid technical support for enterprise compliance management.