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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| YD/T 4307-2023 |
Mobile Internet application Technical requirements for e-mail user change discovery based on SMTP extension {译} 移动互联网应用 基于SMTP扩展的电子邮箱用户变更发现技术要求 |
China Telecommunication Industry
Standards SMTP |
 English PDF |
| YD/T 2144-2010 |
Technical specification for SMTP extension to support Chinese internet email address 基于简单邮件传输协议（smtp）的互联网中文电子邮件地址技术要求 |
China Telecommunication
Standards SMTP |
English PDF |
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