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GB/T 46466-2025Chinese internet email addresses - General technical requirements for the framework (English PDF)

中文电子邮件地址　框架结构总体技术要求

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

October 31, 2025

Implementation date

February 1, 2026

Scope

GB/T 46466-2025 is the English-translated version of 中文电子邮件地址　框架结构总体技术要求.

GB/T 46466-2025 is the Chinese standard "Chinese internet email addresses - General technical requirements for the framework". Its scope clause reads: This document specifies the overall technical requirements for the framework of using Chinese email addresses on the Internet.

This document applies to email address service providers and software vendors developing applications or services that support Chinese email addresses. Services, etc. Its clauses include terms and definitions.

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Document preview — GB/T 46466-2025

National Standard of the People's Republic of China

ICS: 33.040.40
Classification: M 32

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1.Scope
2 Normative References
3.Terms and Definitions
4.Abbreviations
5.Protocol Basis
6.Agreement Requirements
6.1 General Provisions
6.2 SMTP Extension Framework for Chinese Email
6.3 Email headers and envelopes support Chinese characters. Email address
6.4 Compatible with existing 7-bit email systems
6.5 POP extension supports Chinese email systems
6.6 IMAP extension supports Chinese email systems
6.7 Email client extension supports Chinese email systems

1 Scope

This document specifies the overall technical requirements for the framework of using Chinese email addresses on the Internet.

This document applies to email address service providers and software vendors developing applications or services that support Chinese email addresses.

Services, etc.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 1988-1998 Information Technology - Seven-bit Coded Character Set for Information Interchange

GB/T 32397-2015 Technical Requirements for the Format of Email Headers for Chinese Email Addresses

GB/T 32398-2015 Technical Requirements for Simple Mail Transfer Protocol Extended Specification for Chinese Email Addresses

GB/T 44266-2024 General Technical Requirements for Chinese Domain Names

GB/T 46465-2025 Technical Requirements for the Post Office Protocol (POP) for Chinese Email Addresses

GB/T 46467-2025 Technical Requirements for Interactive Mail Access Protocol (IMAP) for Chinese Email Addresses

3 Terms and Definitions

The following terms and definitions apply to this document.

3.1 email (electronicmail.email)

On a computer network, this refers to the communication between user terminals.

[Source. GB/T 5271.32-2006, 32.01.01, with modifications]

3.2 Unicode character

Characters are identified by their position or code point, and each character is given a unique number.

Note. For example, U 12AB refers to the character located at 12AB in the Unicode table.

[Source. GB/T 46465-2025, 3.2]

3.3

This method represents a string of characters in the Unicode character encoding table as a string of bytes. The characters are represented using...

Encoding is done using sequences of 1 to 4 8-bit bytes. In a sequence of only one 8-bit byte, the high-order bits are 0, and the rest are...

7 bits are used for character value encoding. In a sequence of n (n > 1) 8-bit bytes, the high n bits of the initial 8-bit byte are 1, followed by...

The first bit is 0, and the remaining bits of this byte contain the bits of the encoded character value. The most significant bit of all subsequent 8-bit bytes is 1, and the next bit is...

0, the remaining 6 bits of each byte contain the bits of the encoded character.

[Source. GB/T 46465-2025, 3.3]

JT/T 1076 | YD/T 2554.1 | GB/T 9771.1 | GB/T 46465 | GB/T 46464 | […]

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 9 pages — is available in the English PDF.

Referenced standards

Normative references

Editions of GB/T 46466

Edition	Title	Revision	Status
GB/T 46466-2025	Chinese internet email address - General technical requirement for framework	current edition	Current

This page sells the current edition, GB/T 46466-2025. Earlier editions are listed for reference only.

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