Re: Mailman lists (reply-to) break OpenDKIM signatures

From: Benoit Panizzon <>
Date: Mon, 14 Jan 2013 15:34:28 +0100

Hi P_at_atrick

> MLMs like Mailman modify the Subject:-Header AND add text to the footer by
> default. Both behaviours break the DKIM signature.

True, I was blind, of course the subject is getting tagged by the list.

Is there any way to use opendkim is such an environment? I'm sure the
developers must have tought about managed mailinglists.

What we got here:

Sender (DKIM Signed)
Listserver (DKIM Verify => OK)
Sent by Listserver (additional DKIM Signature added)
Recipient (DKIM Verify fails)


SPAM SPAM SPAM SPAM / Hormel's new miracle meat in a can
Tastes fine, saves time. / If you want something grand, / Ask for SPAM!
  - Hormel's 1937 jingle for SPAM

Hippopotomonstrosesquippedaliophobia sh:
Received on Mon Jan 14 2013 - 14:34:39 PST

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