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RFC # or Protocol:
 
 

Principal RFC(s) for SMTP Protocol

Obsolesence graph for RFC 2821

Simple Mail Transfer Protocol
by J. Klensin, Ed

<< ObsoleteNot Obsolete >>
RFC 2821
RFC 821 Simple Mail Transfer Protocol
RFC 974 Mail routing and the domain system
RFC 1869 SMTP Service Extensions
RFC 1651 SMTP Service Extensions
RFC 1425 SMTP Service Extensions

Obsolesence graph for RFC 2822

Internet Message Format
by P. Resnick, Ed

<< ObsoleteNot Obsolete >>
RFC 2822
RFC 822 STANDARD FOR THE FORMAT OF ARPA INTERNET TEXT MESSAGES
RFC Status Legend
Standard Standard 
Proposed Standard Proposed Standard 
Draft Standard Draft Standard 
Best Practice Best Practice 
Informational Informational 
Experimental Experimental 
Historical Historical 

© 2006 Vance Gloster