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When you drill into a specific sender (for example, Mailchimp), the right-hand panel shows a Source Summary with aggregated statistics for that sender.

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Email Volume Over Time Chart

The bar chart shows daily email volume reported during the selected period. Each bar represents one day. The colour of the bar indicates authentication health:
  • Green bars — all emails from that day passed DMARC.
  • Red bars — one or more emails failed DMARC on that day.
  • Teal/mixed bars — a mix of passing and failing emails.
Hovering over any bar shows a tooltip with two values: Valid DMARC (number of emails that passed) and Invalid DMARC (number that failed). This chart is available at all three drill-down levels: domain, sender, and IP address.
Tip: A sudden spike in volume combined with a compliance drop is a strong signal of either a spoofing campaign or an infrastructure change that broke authentication. Investigate spikes first.

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Sender Locations

Below the Source Summary and the Email Volume chart, the Sender Locations map shows where this sender’s IP addresses are located. See Sender Locations.