They're not zip files. They're gzipped XML files. Some shitty email programs will try to open them as ZIP files, fail, and then claim they're empty. Amazon sen

They're not zip files. They're gzipped XML files. Some shitty email programs will try to open them as ZIP files, fail, and then claim they're empty. Amazon sends these when you or someone pretending to be you sends email to Amazon's domain. They contain the DMARC report you asked for.