We can review the email delivery report using this option. The Track Delivery tool is in cpanel under Email section.
By default, this interface lists the 250 most recent message delivery failures to and from your cPanel account's mailboxes. We can run the report for individual recipient email address or all recipients.
Below is the interface how it looks in cpanel.
Also, you can see separate report for successfully sent emails (Show Successes), deferred emails (Show Deferred), failure emails ( Show Failures) and email in sending progress (Show In-Progress)
There are different section to understand from report: