RFC 4406: Sender ID: Authenticating E-Mail

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…

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Outgoing relationships (4 related RFCs)

Normative reference — RFC 2119: Key words for use in RFCs to Indicate Requirement Levels
Normative reference — RFC 4408: Sender Policy Framework (SPF) for Authorizing Use of Domains in E-Mail, Version 1
Normative reference — RFC 4407: Purported Responsible Address in E-Mail Messages
Normative reference — RFC 4405: SMTP Service Extension for Indicating the Responsible Submitter of an E-Mail Message

Incoming relationships (8 related RFCs)

Normatively referenced by — RFC 4405: SMTP Service Extension for Indicating the Responsible Submitter of an E-Mail Message
Normatively referenced by — RFC 6686: Resolution of the Sender Policy Framework (SPF) and Sender ID Experiments
Informatively referenced by — RFC 4407: Purported Responsible Address in E-Mail Messages
Informatively referenced by — RFC 5518: Vouch By Reference
Informatively referenced by — RFC 5039: The Session Initiation Protocol (SIP) and Spam
Informatively referenced by — RFC 5585: DomainKeys Identified Mail (DKIM) Service Overview
Informatively referenced by — RFC 6577: Authentication-Results Registration Update for Sender Policy Framework (SPF) Results
Informatively referenced by — RFC 7601: Message Header Field for Indicating Message Authentication Status