How could I setup OpenDKIM as milter filter to sign all messages received by MTA via authenticated connection?

From: Lev Serebryakov <lev_at_serebryakov.spb.ru>
Date: Mon, 01 Jun 2015 19:20:37 +0300

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 I want to add DKIM to my mail domain. It is implemented as postfix
server on dedicated hosting in Internet (not as server in my network!).

 I'm sending all my mail via this server, connection to it with SSL
and SASL authentication.

 All HOWTOs and articles describe installation where "InternalHosts"
is known ("internal network"). But it is not my case! I could connect
to my server from any IP, v4 or v6 — my home network, my office,
airports, 3G connection, etc!

 Is it possible to instruct OpenDKIM to sign all mail, received by
postfix via secured AND authenticated connection, no matter from which
host/domain/IP it was received?

- --
// Black Lion AKA Lev Serebryakov
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Received on Mon Jun 01 2015 - 16:20:51 PST