See who's sending as dottob.com.
Google, Microsoft, and other mail providers send daily DMARC aggregate reports for dottob.com — summaries of every server sending as the domain and whether it passed authentication. Monitoring collects them and turns them into a dashboard:
- ✓Pass rates, charted over time
- ✓Every source sending as the domain — legitimate or not
- ✓Spoofing attempts, flagged as they fail DMARC
- ✓Setup is a single one-line DNS change