In section 5.2, the paragraph defining the result for pass should be
changed to
An SMTP server receiving this result SHOULD treat the message as
authentic. However, it MAY treat the message as authentic or not
authentic based on other authentication methods. It MAY accept
or reject the message depending on other policies.
in order to allow for other authentication methods such as POP before
SMTP, SMTP AUTH, etc. It may be possible to find a better phrasing to
address this omission.
--
Daniel Quinlan
http://www.pathname.com/~quinlan/