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Webmail is an online email service accessed through browsers, requiring no client installation, supporting cross-platform multi-device synchronization, with high security and convenience, widely used in personal, enterprise, and educational domains.

Zero Trust Policy is a modern network security concept that emphasizes ’never trust, always verify,’ enhancing security protection through continuous verification, least privilege, multi-factor authentication, and other means.

An email alias is an alternative address associated with a primary mailbox, facilitating categorized management, privacy protection, and unified brand image, suitable for efficient communication for both individuals and businesses.

Load balancing enhances system performance and availability by distributing traffic, supporting high concurrency and scalability scenarios, widely used in web clusters, cloud computing, and microservice architectures.

混合部署结合本地与云端优势，实现灵活、安全、可扩展的企业IT架构。

邮件模板是预设格式的邮件，用于快速生成统一内容，提升沟通效率与品牌形象。

DNSSEC enhances DNS security through digital signatures, preventing domain spoofing and cache poisoning, ensuring users access genuine websites.

OAuth 2.0 is a widely used open authorization protocol that allows users to authorize third-party applications to access their resources without sharing credentials, ensuring security while enabling flexible authorization.

S/MIME is a public key encryption-based email security protocol that provides encryption, signature, and authentication functions to ensure the security and reliability of email communications.

TLS/SSL is an encryption protocol that ensures network communication security by establishing encrypted channels to achieve data confidentiality, integrity, and authentication, widely used in HTTPS, email, VPN, and other fields.