I receive html emails with images which are linked via an external server. This doesn't happen with every email, but when I first open the email or view it via reading pane, the logo is shrunk to a size whch means you can't distinguish what the logo is about. When I click on the image link it appears in the correct size. One of our clients is having the same issue, although he is unable to click back and forth to correct the size of the logo. It seems like an outlook issue?