RFC 5965, "An Extensible Format for Email Feedback Reports", August 2010

Errata ID: 7091
Status: Reported
Type: Editorial
Publication Format(s) : TEXT
Reported By: Alessandro Vesely
Date Reported: 2022-08-16

Section 2 says:

   e.  Except as discussed below, each feedback report MUST be related
       to only a single email message.  Summary and aggregate formats
       are outside of the scope of this specification.

It should say:

   e.  Except when using the Incidents field (see below),
       each feedback report MUST be related
       to only a single email message.  Summary and aggregate formats
       are outside of the scope of this specification.

Notes:

There doesn't seem to be another discussion of similarity.

Report New Errata