The report lists the subject, the sender, the recipients and, for each recipient, the delivery status as far as HawkOpen knows it: for example that the recipient’s mail server accepted the message, or that it was rejected or bounced. Acceptance by a mail server is not delivery to the inbox and not proof that the recipient saw the email. Opens and clicks appear as signals with a classification, never as proof of reading.
Only the account owner can download the report. HawkOpen seals it, but the public verification page shows no details of the message (no subject, addresses or content), and for an email report it cannot confirm the seal independently: it gives the result as indeterminate, because this seal relies on a secret held by HawkOpen rather than a public key.
The report itself states its limits: pixel and link requests can come from privacy proxies, caches, scanners or bots, and it is not a qualified electronic delivery service. Keep the original email in your mailbox and ask a lawyer how evidence is assessed in your case.