Mail.app has an option to show a Reply-To header when composing emails. Like many of us, I have a forwarding account which I would like to be used for all replies, instead of the email address for the ISP accounts.
Manually adding the headers is a thing of the past now, as there is an AppleScript to automatically add the Reply-To headers to *all* outgoing mail automatically. Here is the info from the original poster:
Try the Applescript called 'Add Headers to Outgoing Email'. In case you don't read the Read Me: THESE SCRIPTS ARE NOT SUPPORTED BY APPLE. USE AT YOUR OWN RISK.The AppleScript writes the default header to a Mail.app preferences file, so it will add the header until it is edited or removed entirely with the "remove" script, also thoughtfully provided by cricket.
- cricket
Mac OS X Hints
http://hints.macworld.com/article.php?story=20020904062730654