When replying to a message in Apple Mail it does not use the address to which the original was sent

Question

I use Apple Mail with Mountain Lion (10.8.2). When I reply to an email it does not, as it used to do, use the email address to which the email was sent. Nor does it use my nominated email address fro creating emails. (It simply selects the first address in my account list (iCloud) and I am unable to change the list order and in any case this is not a solution.)
I cannot find a setting to have replies sent from the address I received it in.
Bruce

Answer 1

Here we go. The problem is how the sender replied to a message then sent to you. He/she inserted the reply above the quoted text, and added a sig delimiter '-- '.
When you reply to the message you received, TB treats everything below the sig delimiter as signature, and cuts it off. This is the intended behavior.
http://email.about.com/od/emailsignaturenetiquette/qt/Use_the_Standard_Email_Signature_Delimiter.htm
So ideally the reply should be inserted below the quoted text. Since this is beyond your control, use 'Forward' instead of 'Reply' as a workaround.
You'll then need to add the recipients manually in the 'To' field.