It is not meant to catch the envelope sender. That should be in your normal checks. This is specifically for the data From:, which is what these are using.
this will reject maillist posttings of your ownunless the maillists takes over From: header and claims maillists breaks spf and dkim / dmarc, with all the no needed mess with it, now in future openarc will seel it so opendmarc does not reject mangled mails on maillist
we all wins :(
