[nerdburn]

At the moment you can put in HTML or Markdown files. The formatting is handling by the sites theme, but you're welcome to add inline styles to the HTML files.

Eventually we'll add support for any kind of file that you can put in Dropbox.

Good question, thanks!

[nerdburn]

Oh, here's our documentation on using Dropbox with Postach.io:

http://help.postach.io/intro-to-using-dropbox-with-postach-i...