Retrieve the report totals of the campaign a message belongs to, with the message applied as the filter. This is the v3 equivalent of calling the v1 campaign_report_totals action with only a messageid.

As in v1, the message only narrows the totals on a split campaign; elsewhere the whole campaign is reported. The response is the same shape as Retrieve a campaign report totals, and the same date window rules apply: startDate and endDate must be sent together.

A message that belongs to no campaign is a 404.