Table of Contents

 1     Scope          
 2     References
 3     Definitions 
 4     Abbreviations and acronyms             
 5     Conventions             
 6     Certified mail basic concepts             
 7     Types of certified mail commands   
        7.1     Types of CMTP commands      
        7.2     Types of CPOP commands       
 8     Detailed CMTP specification              
        8.1     CELO: Ask for delivery type list               
        8.2     Delivery type list          
        8.3     Selected delivery type               
        8.4     Delivery type acknowledgement          
        8.5     Sender's e-mail address            
        8.6     Sender's e-mail acknowledgement      
        8.7     Ask for sending e-mail to recipient       
        8.8     Check recipient's e-mail address by the remote Cmail server   
        8.9     Recipient's e-mail address acknowledgement
       8.10     Recipient's e-mail acknowledgement
       8.11     Ask for sending ENVELOPE     
       8.12     Ready to receive ENVELOPE  
       8.13     ENVELOPE     
       8.14     Server signed notice of deposit            
       8.15     Sender and server signed notice of deposit    
       8.16     ENVELOPE between Cmail servers      
       8.17     Signed notice of transit between Cmail servers            
       8.18     Signed notice of transit            
 9     Certified post office protocol (CPOP)             
        9.1     Ask for pending messages       
        9.2     Challenge recipient and server signed notice of reception        
        9.3     Challenge response and recipient and server signed notice of reception            
        9.4     ENVELOPE       
        9.5     Recipient and server signed notice of reception between Cmail servers (optional)        
        9.6     Recipient and server signed notice of reception            
Annex A – Notices in XML schema definition (XSD)    
        A.1     XSD overview
        A.2     Formal specification of notices in XSD
Annex B – Notices in ASN.1    
Annex C – Requirements on public-key infrastructure components    
        C.1     Introduction  
        C.2     Cmail server end-entity public-key certificates               
        C.3     Cmail client end-entity public-key certificates 
        C.4     Information validation requirements  
Annex D – Requirements on transport layer security (TLS)    
Annex E – Object identifiers defined in this Recommendation    
Appendix I – Envelope and notices format    
        I.1     Notice of deposit          
        I.2     Notice of reception      
        I.3     Notice of transit            
        I.4     ENVELOPE        
Bibliography