RFC RFC is also an abbreviation for Request for Comments
• The Requests for Comments (RFC) document series is a set of technical and organizational notes about the Internet (originally the ARPANET), beginning in 1969. Memos in the RFC series discuss many aspects of computer networking, including protocols, procedures, programs, and concepts, as well as meeting notes, opinions, and sometimes humor. ". • While there are over 4,400 RFCs
• RFC 821 - Simple Mail Transfer Protocol • RFC 2119 - Key words for use in RFCs to Indicate Requirement Levels • RFC 2396 - Uniform Resource Identifiers (URI): Generic Syntax • RFC 793 - Transmission Control Protocol • RFC 1123 - Requirements for Internet Hosts Application and Support • RFC 1034 - Domain names - concepts and facilities • RFC 2616 - Hypertext Transfer Protocol -- HTTP/1.1
The SMTP provides mechanisms for the transmission of mail; directly from the sending user's host to the receiving user's host when the two host are connected to the same transport service, or via one or more relay SMTP-servers when the source and destination hosts are not connected to the same transport service.
http://www.faqs.org/rfcs/
IETF The IETF (Internet Engineering Task Force) IETF is a large open international community of network designers, operators, vendors, and researchers concerned with the evolution of the Internet architecture and the smooth operation of the Internet. It is open to any interested individual. The actual technical work of the IETF is done in its working groups, which are organized by topic into several areas (e.g., routing, transport, security, etc.).