If you don't code or have access to developers, you can also try dynamic report links on the Account page. The basic idea that that you're looking at the Acme account page, and you can click a link that opens a reports that's dynamically prefiltered to show data related to Acme. Move to the Smith Inc. page? The linked report shows Smith Inc. data.
You should be able to build a report that shows email statuses related to contacts related to Account X--the link automatically fills in Account X based on which account you're looking at.
Building the link is pretty straightforward. There are a number of explanations on how to do this all over the web (some good, some bad, some dated). Here are a couple of the better ones.
Instructions vary slightly depending on if you want to pull up the report via a HYPERLINK() in a formula, a Custom Link or a button.
Beware: this opens the door to all kinds of seemingly magical things you can do with hacking Salesforce URL's via buttons and links.