[Users] When replying, how is the To address chosen?

[Adrian]

Thanks again Paul

I hadn't spotted the "Reply as attachment" option, so I saved the
message source and sent it as an attachment, as I assumed you meant.

Similarly I had never used the right-click Reply options or known
that they were there.  I'd always used the Reply toolbar button.

I begin to realise just how configurable Claws mail is.  But I have
another question that by chance has just cropped up.  Not very
important but would be useful, and I'll send it as a new topic.

Adrian