unfortunately not...
what I would like to have is "free choice" in the settings - in the Menu "Verfassen und Senden" (in English "write and Send"?). Instead of a choice limited to BCC to myself, to any address.
Now, after going back to that setting again, looking at it carefully, I saw that line below and realized that I could try to write an address on that line. I didd it, wrote a test mail - and it was a full success! Now I have that central archive account to which a carbon copy of every mail send from one of my six accounts will go.
That Aqua Mail is good, I knew before - no I realize, it is even better than only good
Götz
May be it would be good to make this choice a bit more evident