RFC 5598, "Internet Mail Architecture", July 2009Source of RFC: IETF - NON WORKING GROUP
Area Assignment: app
Errata ID: 7150
Publication Format(s) : TEXT
Reported By: Dave Crocker
Date Reported: 2022-10-08
Section 4 says:
Figure 5: Protocols and Services
It should say:
Figure 5: Protocols and Services (with reporting details)
Figure 5 is careful to list each of the architectural components from an author to a recipient. However there are multiple places in that sequence that can generate a report back to the author or originating system. The diagram showing these is overly simplistic and for example, does not show the requisite submission or delivery agents needed for such return reporting.
Fixing this will require some thoughtful reworking of the diagram.