dmarc failure when sending to the list

From: Patrick Proniewski <>
Date: Mon, 7 Jul 2014 13:31:39 +0200


I've enabled DMARC on my domain yesterday ( with p=none), few hours before posting my question about LogWhy verbosity. When I've sent this first email to the list, I've started to get failure reports.

The mail is sent to subscribers with both and DKIM signature, and one of the reports shows headers from this message:

                dkim=pass (1024-bit key; unprotected) header.b=lvOvWAsu;
                dkim=fail reason="no signature error" (1024-bit key; unprotected) header.b=VXvJ53xD

I can see that people here manage to send DKIM signed email to the list that are properly checked by my server:

        Authentication-Results: (amavisd-new);
                dkim=pass (1024-bit key) header.b=3LBzXNHA;
                dkim=pass (4096-bit key) header.b=f0/7Sas7

Is this a problem on my side?

Received on Mon Jul 07 2014 - 11:31:52 PST

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