Applescript and the "reply to" field of outgoing message

Question

I have a useless script that works.
tell application "Mail"
set newMessage to make new outgoing message ¬
with properties {content:"My name <[email protected]>"}
set visible of newMessage to true
end tell
I also note from the Mail dictionary that an outgoing message has the following properties: content, sender, subject, content, visible, message signature (signature), id .
I'm puzzled: why aren't there more properties? In particular, I would like to set the Reply To: and Account: fields with something like the following script.
tell application "Mail"
set newMessage to make new outgoing message ¬
with properties {sender:"[email protected]", reply to:"[email protected]"}
set visible of newMessage to true
end tell
I've discovered (with that second script) that the sender property corresponds to the Account: field. But can I get the Reply To: field visible and filled with AppleScript? Or with something else? Automator?
PowerBook G4, Cube   Mac OS X (10.4.6)   Also running 10.2.8 on a Cube, hopefully 10.3.9 soon

Answer 1

Applescript only has access to the objects and properties in the various dictionaries; for mail, as you have discovered, this does not give access to much for an outgoing message. In particular, you cannot access headers such as date or priority or reply-to. If, as in your script, you are making the outgoing message visible before sending it, then you can fill in the reply-to field by hand, but short of trying some gui scripting you can't change it via applescript.
I suggest you use OS X Feedback to complain.
AK