Hello,
I took the chance to audit the Exim implementation for making sure I
read the draft closely and while doing so, I found some minor issues
with my code, but none with the draft.
Section 4.6, "Restricting Replies to Automated Processes and Mailing Lists"
gives a list of List-* header fields. Is it certain that no other fields
are in use? Exim uses the pattern List-*, which would be easy to change.
I asked this on the Exim list as well.
Section 5.8, "In-Reply-To and References" says:
Replies MUST have the In-Reply-To field set to the Message-ID of the
original message, and the References field SHOULD be updated with the
Message-ID of the original message.
If the original message lacks a Message-ID, an In-Reply-To need not
be generated, and References need not be changed.
Please add a reference to RFC 2822, section 3.6.4, "Identification
fields". It explains how to build the new references header in detail.
The above section summarises it well, but it should tell that there is
more to obey.
Michael