[opendmarc-users] Why did this one fail?

[postfix at ptld.com]

I had an email sent to me from another mailing list. The sender envelope 
was the mailing list and the header-from was my email address.

   DKIM: mx.kolabsys.com [95.128.36.23] not internal
   DKIM: not authenticated
   DKIM: message has signatures from kolabsys.com, ptld.com
   DKIM: DKIM verification successful
   DMARC: ignoring Authentication-Results at 4 from 
ext-mx-out002.kolabsys.com
   DMARC: ignoring Authentication-Results at 11 from 
ext-mx-out002.kolabsys.com
   DMARC: ignoring Authentication-Results at 16 from 
ext-mx-in002.kolabsys.com
   DMARC: SPF(mailfrom): lists.roundcube.net none
   DMARC: ptld.com fail

The SPF was none not failed, and the DKIM verified. I thought as long as 
at least SPF or DKIM checks out then DMARC should pass.