While I'm not exactly a fan of all details in "email-arch",
I really do not like to reinvent the wheel, especially if
that could result in inconsistencies. Appendix A is better
covered in the "email-arch" memo, so why not reference it ?
I'd understand "timing problem", but then the overview has
the same problem with its "sender-auth-header" reference.
The last round of "email-arch" reviews arrived at editorial
nits in the security and I18N considerations, it's at least
as near to (some value of) ready as "sender-auth-header".
Frank
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