Office web apps preview .msg files
Office web apps offers great added value for end users within SharePoint 2013, but still misses the ability to preview .msg files. Not in all cases the alternative of site mailboxes eg in our case we have about 200K site collections which all contain quite some .msg files.
The ability to preview these messages from eg within search compared with opening each mail would enhance our end user experience significantly.
Mark Simone commented
Same for .html files...