Subject: drums-msg-fmt, section 3.6.2, "From:"

From: Rolf Weber <[email-masked]>
Date: Wed, 22 Sep 1999 13:16:44 +0200 (MET DST)

In section 3.6.2, it says:

: The "From:" field specifies the author(s) of the message, that
: is, the mailbox(es) of the person(s) or system(s) responsible for the
: writing of the message.

OK - but a few sentences later:

: In all cases, the "From:" field SHOULD NOT contain any mailbox that does
: not belong to the author(s) of the message.

How does this match?
If the first quote ist true, it should be a "MUST NOT".
(... and would be completely redundant.)

Or what do I miss?

rolf