RFC 5751, "Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.2 Message Specification", January 2010Source of RFC: smime (sec)
Errata ID: 4273
Reported By: Peter Gutmann
Date Reported: 2015-02-18
Section Global says:
RFC 5751 contains several S/MIME sample messages, prefixed with the text "A sample message would be". These samples aren't actually valid S/MIME messages but merely contain 141 bytes of random garbage. In other words the S/MIME "sample messages" aren't actually sample messages.