Sorry, only just got back to comments today. I'm in academia, so yes, not big on branding. The only attachments I like to receive are papers, calls for papers,

Sorry, only just got back to comments today. I'm in academia, so yes, not big on branding. The only attachments I like to receive are papers, calls for papers, agendas, student work, stuff like that. These tend to be important and can get lost in the pile if every email comes with an attachment. Mail.app handles any attachments as attachments (even inline ones). If images are linked to as part of HTML email it will display them (but not by default due to spam tracking -- you have to click a button to display them), and not count them as attachments though.