There's a paperclip next to the date and if you hover over it, a tooltip gives the name of the attached file. I don't think I've ever confused an attachment wi

There's a paperclip next to the date and if you hover over it, a tooltip gives the name of the attached file. I don't think I've ever confused an attachment with an image anyways, but there at least seems to be a standardized way to differentiate them. Google employees do use an internal version of gmail. (I don't work at Google though)