Cited in: RFC 3848

5 RFCs mentioned in the text of RFC 3848 (ESMTP and LMTP Transmission Types Registration)

RFC	Title	Status	Date
821	Simple Mail Transfer ProtocolJ. Postel · obsoleted by RFC 2821	Internet Standard	August 1982
1869	SMTP Service ExtensionsJ. Klensin, N. Freed, M. Rose, E. Stefferud, D. Crocker · obsoleted by RFC 2821	Internet Standard	November 1995
2033	Local Mail Transfer ProtocolJ. Myers	Informational	October 1996
2821	Simple Mail Transfer ProtocolJ. Klensin, Ed. · obsoleted by RFC 5321	Proposed Standard	April 2001
3207	SMTP Service Extension for Secure SMTP over Transport Layer SecurityP. Hoffman	Proposed Standard	February 2002