So, does that mean people can't communicate relatively securely simply by clicking reply to pass back & forth an ongoing e-mail message as it develops?
Put differently, how do we get continuity of communication if we gotta keep restarting new e-mails with new subject headings everytime we want to respond to something or add new details????
no, that isn't what it means. if they, as a person, send you an email you can reply without issue. but not to an automated bounce back. if you notice when you open a bounce back on safe mail, it says
From: "Badass Source" <BadassSource>
Reply to: [email protected]
but if you open an email you have received from that same person that wasn't an automated bounce back, the reply to: part is omitted.