Right now we get an e-mail every night of daily email performance. It includes email name, #sent, #delivered, etc. There's also a link to the report in Marketo.
If you follow the link to Marketo, you can click the email's name and it takes you to a preview. I'd like that link to be added to the report that is delivered to our inboxes. Quite a few people have requested this feature, and it doesn't look like it's possible via the API or any settings within Marketo.