RFC 4865: SMTP Submission Service Extension for Future Message Release

This memo defines an extension to the SMTP submission protocol for a client to indicate a future time for the message to be released for delivery. This…

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Outgoing relationships (2 related RFCs)

Updates — RFC 3464: An Extensible Message Format for Delivery Status Notifications
Updates — RFC 3463: Enhanced Mail System Status Codes

Incoming relationships (1 related RFC)

Informatively referenced by — RFC 6729: Indicating Email Handling States in Trace Fields