Architecture of email in cn

A great topic!

The architecture of email in China is a complex system that involves multiple players, technologies, and standards. Here's an overview:

Email Service Providers (ESPs)

In China, there are several major ESPs that provide email services to individuals and businesses. Some of the most popular ones include:

  1. Alibaba Group's Aliyun (阿里云) - a cloud-based email service
  2. Tencent's QQ Mail (QQ邮件) - a popular email service with over 400 million users
  3. 163.com (163邮箱) - a free email service provided by NetEase
  4. Sina.com's Sina Email (新浪邮箱) - a popular email service with over 100 million users
  5. China Mobile's China Mobile Email (中国移动邮箱) - a mobile-focused email service

Email Infrastructure

The email infrastructure in China is built on top of the following technologies:

  1. SMTP (Simple Mail Transfer Protocol) - used for sending and receiving emails
  2. POP3 (Post Office Protocol version 3) - used for retrieving emails from a mail server
  3. IMAP (Internet Message Access Protocol) - used for accessing and managing emails on a mail server
  4. DNS (Domain Name System) - used for resolving domain names to IP addresses
  5. MX Records (Mail Exchanger Records) - used for routing emails to the correct mail server

Email Standards

China has its own set of email standards, which are based on international standards such as RFC (Request for Comments) and IETF (Internet Engineering Task Force) standards. Some of the key Chinese email standards include:

  1. GB/T 22885-2008 (Chinese Standard for Email) - a national standard for email
  2. GB/T 22886-2008 (Chinese Standard for Email Address) - a national standard for email addresses
  3. CMM (Chinese Mail Message) - a Chinese standard for email messages

Email Security

Email security is a major concern in China, given the country's strict internet regulations and the risk of cyber attacks. To address these concerns, Chinese ESPs and email users employ various security measures, including:

  1. Encryption - used to protect email content and prevent eavesdropping
  2. Authentication - used to verify the identity of email senders and recipients
  3. Spam filtering - used to block unwanted emails and reduce the risk of phishing attacks
  4. Virus scanning - used to detect and remove malware from emails

Challenges and Opportunities

The email landscape in China is characterized by several challenges and opportunities, including:

  1. Rapid growth of the internet user base and email adoption
  2. Increasing demand for mobile email services
  3. Growing concerns about email security and spam
  4. Opportunities for innovation and development of new email services and technologies

Overall, the architecture of email in China is a complex system that involves multiple players, technologies, and standards. While there are challenges to be addressed, the email landscape in China also presents opportunities for innovation and growth.