You verify a domain, return the next day and find an empty chart. That does not establish that setup failed, and it does not establish that Gmail is happy with your mail.

Work through the reporting conditions before making changes to your program.

Check ownership and the selected domain

Confirm that the domain is verified in the account you are using. Then inspect a real message from the sending platform you want to monitor. Does its authentication domain match the domain you added?

A newsletter signed with updates.example.com may not produce the information you expect when you look only at another domain. A configured domain that sends no relevant mail can also have no results.

Check the traffic and date range

Postmaster Tools covers personal Gmail recipients. Sending to a large list of corporate Google Workspace addresses does not create the same reporting population.

Choose a period containing genuine sends and allow for the reporting delay. Google says data generally updates within 24 hours but can take longer. The charts use UTC, so a late evening campaign may fall on a different reporting date from your ESP's local calendar.

Low volume can prevent Google from showing data for privacy reasons. The bulk-sender threshold should not be treated as a guaranteed minimum that populates every chart. Feedback Loop also has its own message and complaint activity conditions.

Distinguish a gap from a recorded zero

A zero is a reported value. A gap means the dashboard has not supplied a usable value for that period. Keep that distinction in any report you prepare for a client or colleague.

If results disappear after a period of high complaints, investigate actual placement as well. Google's dashboard guidance describes cases where more mail goes directly to spam and fewer inbox recipients report it.

My recommendation is to keep the expected sending schedule while you check headers, recipient mix and reporting dates. Increasing volume just to make a chart appear adds another variable without resolving whether the monitored domain is correct.

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