DMARC report analyzer
Upload aggregate reports and see who sends mail as your domain.
Read in your browser. Reports are not uploaded or stored.
Where reports come from
When your DMARC record has a rua= address, mailbox providers send it a daily XML file listing every server that sent mail as your domain. This tool turns those files into a table so you can spot services you forgot to authorise and sources that are pretending to be you.