RFC 4406 has been reclassified as Historic.
RFC 4406
Title: Sender ID: Authenticating E-Mail
Author: J. Lyon,
M. Wong
Status: Historic
Stream: IETF
Date: April 2006
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-lyon-senderid-core-01.txt
URL: https://www.rfc-editor.org/info/rfc4406
DOI: 10.17487/RFC4406
Internet mail suffers from the fact that much unwanted mail is sent
using spoofed addresses -- "spoofed" in this case means that the address
is used without the permission of the domain owner. This document
describes a family of tests by which SMTP servers can determine
whether an e-mail address in a received message was used with the
permission of the owner of the domain contained in that e-mail
address. This memo defines an Experimental Protocol for the Internet community.
HISTORIC: This memo defines a Historic Document for the Internet
community. It does not specify an Internet standard of any kind.
Distribution of this memo is unlimited.
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