A few minor issues:
a. all-uppercase words in -core
"DOMAIN" is used only once in all-uppercase (in 2.1). RFC 2822
doesn't appear to use it that way. Same issue for "MOST RECENT" and
"UNRELATED" (both in 2.1).
b. "domain" is not defined in -core and other documents
For clarity, "domain" should be defined as an RFC 2822 domain. That
is, it should be defined as the right-hand-side of an email address.
c. to fix some awkwardness in the introduction, I suggest this
replacement:
s/substantially all of the/nearly all/
--
Daniel Quinlan
http://www.pathname.com/~quinlan/