Nicolas,
As Brian notes, the formal messages go out on ietf-announce. However, I
think all the ADs sponsoring individual documents attempt to reach the
right audience. This includes personally reminding key contributors,
forwarding the last call announcement to a mailing list if one is still
known, etc. We also say so in our published procedures:
http://www.ietf.org/iesg/statement/ad-sponsoring-docs.html
The exact nature of the review within the IETF is not specified, but
it is expected that documents be posted for review in the relevant WG
mailing lists. Often no relevant mailing list exists, in which case
area-specific or IETF main discussion list can be used.
... work closely related to a WG but strictly outside its charter
should always be brought to the WG's attention during review.
Of course, its also easy to forget to do this in the midst of all other
things that are going on.
Jari
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