We use MailChimp for newsletters and group invitations. Currently, our desktop interface shows the html version of the email,, but does not display the graphics, just an empty space. The mobile interface displays a lot of blank space, if you scroll down enough you can get to the main message, but it runs off the screen. Graphics are not displayed and neither are the standard items at the bottome of the email.
If I open the email in MAC mail, it displays properly, so I am inclined to think this is a compatibility issue with smartermail, not a problem with the original emal sent from MailChimp.