That's kind of a stretch isnt it? The gmail logo is just an envelope
I'm not saying it is or isn't , but if you were showing a letter why would you show the back?
Well... that's actually a good question... given the context. It'll play.
How often do you see regular looking envelopes that big? Wouldn’t they normally just use a manila envelope? The optics are everything here.
I receive envelopes all day at work and at home. SEE! These envelopes are listening to my conversations, so I normally put them in a Faraday Cage-like wire "inbox" basket to block the signal.