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Date:      26 Nov 2018 12:21:33 -0500
From:      "John Levine" <johnl@iecc.com>
To:        freebsd-questions@freebsd.org
Cc:        vas@mpeks.tomsk.su
Subject:   Re: Invalid DKIM signatures in this list
Message-ID:  <20181126172133.CDCDB2008E6098@ary.qy>
In-Reply-To: <20181126125259.GB86999@admin.sibptus.ru>

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In article <20181126125259.GB86999@admin.sibptus.ru> you write:
>Dear Colleagues,
>
>I have noticed that the Mailman which manages this list keeps the 
>sender's "DKIM-Signature:" header intact but modifies the body of the 
>message by adding a footer.
>
>This behavior invalidates the sender's digital signature with
>"dkim=fail (body hash mismatch; body probably modified in transit)". 

Quite right.  That's how DKIM works.

>Whom do I contact about it?

Nobody.  See RFC 6376, section 6.3.

R's,
John



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