[Discuss] Email failure notices from blu.org?

[dbarrett at blazemonger.com (Daniel Barrett)]

I've been receiving a bunch of DMARC email failure reports relating to
driftwood.blu.org and vranix.blu.org (216.235.254.230). Does anybody
know why these happen? I'm guessing it has something to do with the
way BLU forward emails to list members...? Here is a typical failure
report. As far as I can tell, my domain's DKIM and SPF records are set
up correctly, since I send many other emails successfully and only
blu.org seems to be generating these errors.

  <record>
    <row>
      <source_ip>216.235.254.230</source_ip>  /* vranix.blu.org */
      <count>1</count>
      <policy_evaluated>
        <disposition>none</disposition>
        <dkim>fail</dkim>
        <spf>fail</spf>
      </policy_evaluated>
    </row>
    <identifiers>
      <envelope_to>adobe.com</envelope_to>          /* huh? */
      <envelope_from>driftwood.blu.org</envelope_from>
      <header_from>blazemonger.com</header_from>    /* my domain */
    </identifiers>
    <auth_results>
      <dkim>
        <domain>blazemonger.com</domain>
        <selector>default</selector>
        <result>fail</result>
      </dkim>
      <spf>
        <domain>driftwood.blu.org</domain>
        <scope>mfrom</scope>
        <result>none</result>
      </spf>
    </auth_results>
  </record>

Thank you for any insights,
Dan