Is it possible to view mailing statistics?

Yes, absolutely, click on your first and last name at the top right of the screen.  

Then click on "Settings" then "Statistics".   You will then see the statistics related to your account concerning electronic notifications and consent requests. You will be able to consult the opening rate percentage for messages transmitted, opened and attachments downloaded by the recipients of your sendings. 

If you are an administrator or reporting administrator of your organization's account, you will also be able to view statistics for the entire organization.