Portable Network Graphics. Â Your browser ought to be able to open this if it's even remotely modern.
Well, all I can say is.....
"Internet Explorer doesn't know how to handle the type of file you have selected.
You can choose to save this file to your disc or you can configure a Helper Application for this file.
MIME Type: image/png
File Name: MSLETTER.png
Cancel | Save File as... | Plugin | Application"
^_____^;;;