Shenzhen Yisanba Computer Technology Co., Ltd. is a globally leading cloud computing service provider. It is among the very few companies worldwide that specialize exclusively in enterprise email solutions—including spam filtering, antivirus protection, email protocols, and email relay.

The company originated as Shenzhen Yiming Technology Information Co., Ltd. (China Post), established in 2005. In 2016, it underwent acquisition, restructuring, and strategic investment, launching the new "138" email brand. It is one of China’s earliest enterprises dedicated solely to enterprise email services.

The 138 Enterprise Email platform is built upon Coremail—the mature, market-proven email system trusted by over 800 million users. Its email system has passed China’s National Information Security Evaluation Center EAL3+ certification, China State Secrecy Bureau certification for confidential information products, Ministry of Public Security certification for security-specific products, and China’s Level-3 Cybersecurity Protection Certification. Shenzhen Yisanba Computer Technology Co., Ltd. holds the copyright for "Email Transmission Technologies" and "A Practical Guide to Preventing Email Fraud."

Shenzhen Yisanba Computer Technology Co., Ltd. employs R&D and technical operations teams with over ten years of industry experience in enterprise email systems. The company owns proprietary intellectual property and an industry-leading, self-developed enterprise email customer management system, delivering service standards exceeding industry norms to all users. Its clients include multinational corporations and Fortune 500 companies such as China International Capital Corporation (CICC), China CNR Corporation (now CRRC), Japan Hirose Electric Group, and Cambodia JC Airlines—as well as users in insurance, securities, finance, defense, security, and telecommunications sectors requiring the highest levels of confidentiality and security.

Leveraging robust technical capabilities and standardized service systems, 138 was the first in the industry to introduce its "Double Compensation Guarantee for Account Theft" commitment—providing global users with secure, stable, and trustworthy enterprise email products and services.

Company Vision: To serve over one hundred million enterprise users worldwide and become a respected internet enterprise!