The Message Tracking Working Group will design a diagnostic protocol for a message originator to request information about the submission, transport, and delivery of a message regardless of its delivery status. The group will produce two standards track documents: a message tracking model document and a protocol document. The model will state how message tracking is enabled, identify the entities involved, define how and when message tracking requests are issued and answered, define approaches for inter-domain message tracking, and address security issues. The submission, transport, and delivery of RFC 822bis messages will be tracked from the time such messages enter the messaging network up until the time they are discharged (e.g. to an IMAP server, to an end-user's mailbox, or a proprietary mail system). The group will design one or more protocols to implement message tracking as described above.