Foreword
Introduction
Section one - Introduction
1. Scope
2. Normative references
3. Definitions
4. Abbreviations
5. Conventions
Section two - General Description of MHS
6. Purpose
7. Functional Model of MHS
7.1 Description of the MHS Model
7.2 Structure of Messages
7.3 Application of the MHS Model
7.4 The Message Store
8. The Message Transfer Service
8.1 Submission and Delivery
8.2 Transfer
8.3 Notifications
8.4 User agent
8.5 Message Store
8.6 Access Unit
8.7 Use of the MTS in the Provision of Public Services
9. The IPM Service
9.1 IPM Service Functional Model
9.2 Structure of IP-messages
9.3 IP-notifications
10. Intercommunication with Physical Delivery Services
10.1 Introduction
10.2 Organizational Configurations
11. Specialized Access
11.1 Introduction
11.2 Teletex Access
11.3 Telex Access
Section three - Capabilities of MHS
12. Naming and Addressing
12.1 Introduction
12.2 Directory Names
12.3 O/R Names
12.4 O/R Addresses
13. MHS Use of Directory
13.1 Introduction
13.2 Functional Model
13.3 Physical Configurations
14. Distribution Lists in MHS
14.1 Introduction
14.2 Properties of a DL
14.3 Submission
14.4 DL Use of a Directory
14.5 DL Expansion
14.6 Nesting
14.7 Recursion Control
14.8 Delivery
14.9 Routing Loop Control
14.10 Notifications
14.11 DL Handling Policy
15. Security Capabilities of MHS
15.1 Introduction
15.2 MHS Security Threats
15.3 Security Model
15.4 MHS Security Features
15.5 Security Management
16. Conversion in MHS
17. Clause 17 of the corresponding CCITT Recommendation
      is not part of this International Standard
Section 4 - Elements of Service
18. Purpose
19. Classification
19.1 Purpose of Classification
19.2 Basic Message Transfer Service
19.3 MT Service Optional User Facilities
19.4 Base MH/PD Service Intercommunication
19.5 Optional User Facilities for MH/PD Service
      Intercommunication
19.6 Base Message Store
19.7 MS Optional User Facilities
19.8 Basic Interpersonal Messaging Service
19.9 IPM Service Optional User Facilities
Annexes
A. Glossary of Terms
B. Definitions of Elements of Service
C. New Elements of Service in 1988
D. Differences between ISO/IEC 10021-1 and CCITT
      Recommendation X.400