Those report-domain-...xml attachments in your inbox, decoded. Drop a file (.xml or .xml.gz) or paste the XML — parsed entirely in your browser. Nothing leaves your machine.
Each row is a source IP that sent mail claiming to be your domain during the report window. For each source you see message volume and whether SPF and DKIM aligned — i.e. passed and matched your From domain.
p=quarantine.Any domain with a rua= tag in its DMARC record receives daily aggregate reports from Gmail, Microsoft, Yahoo and others. No rua tag? Check your record with the DMARC checker.
More tools: Domain Grader · SPF Checker · DMARC Checker · DKIM Checker · Blacklist Checker