Continuing in the same vein, I got the following from a user who uses primarily and doesn’t usually log into discourse:
Great illustration of the concern about private messages - I responded directly to your email address because I didn’t know who else was on the message chain (I’m in Gmail right now).
I had written a message in discourse to her and 4 other people. She replied to the email notification … but changed the addressee to my email address because she wasn’t sure who it would go to if she replied to the message via discourse.
She has a point. So for messages, the footer also needs to indicate who the other recipients/participants in the message are.