Analyse DMARC Aggregate Reports (RUA) XML files sent back to you
Just create a working directory and put this PHP script inside. Download all the files you want to be analysed in the same directory. Put ZIP, GZ and XML files all together.
Just lanch the script that will analyse all the files it can, and report the content in a human readable text, ordered by date.
$ chmod +x analyse.php
$ ./analyse.php