Karamazov wrote:
As far as I’m aware a message in “outbox” has been sent, but not read, and it will move to “sent messages” when the recipient reads it.
I may be completely wrong, if I am: threadbump!
Hopefully someone else will be certain on the subject.
You are correct.
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“Do not fear to be eccentric in opinion, for every opinion now accepted was once eccentric.” ― Bertrand Russell