From: when Bounce

Before considering your request, can you please elaborate why you feel the original senders' From: should be added when you use the Bounce functionality? For which purpose do you use this function?

It is a core feature used for keeping senders details intact.
I use it to bounce emails for others to deal with while leaving me out of it eg misdirected emails. Redirecting enquiries to auto responders which use From: to address sender. Sending on emails to warehouse where they need to know who the order is from. Checking sent drawer to see when orders sent. Returning emails like newsletters back to mailbox for later reading or dealing with.
Ideally From would also be optionally free to put some thing else in as do write emails for other people, but can use the identity to create a temporary sepparate identity.
Have gone back to 2.7 to get back a functional bounce.

After reading your request and thinking about the matter again, I agree that we should change the current behaviour if the 'bounce' functionality to comply with common standards. See, e.g. ​http://mailredirect.mozdev.org/ for a similar functionality provided for thunderbird. However, we should do the following to be fully compliant:

1. rename the functionality to 'Mail Redirect' because Bounce is not clear enough .
2. add support for all the additional 'Mail-Resent' header entries mentioned in the rfc2822 standard and link above.

If all of the above is fullfilled I think fixing the bounce functionality like you expecting it would be possible.

http://yam.ch/wiki/FAQ/Using%20YAM#WhatsthepurposeoftheBounceoptioninYAMandcanIuseittoe.g.bounceSPAMmailback

FAQ 4:3 Bounce has been included as you describe since version 2.3

And called Bounce

Please if you have to change the name make it Bounce Redirect

The Amiga B combination is used for Bounce Amiga - M (Mail Redirect) Amiga - R (Redirect) are in use
It has been Bounce since 2.3 back in 2001 without problem and would be known for 12 years as Bounce by people who use it
rfc2822 Feature of mail redirecting is also known as bouncing.

Thanks for the hint. It has benn long ago since I enhanced the bounce functionality in YAM. With the new identity management I might have introduced the current missbehaviour. Nevertheless, just because the feature has been called Bounce since 2001 doesn't make it more correct (Bounce gives the impression that the festure can be used to sent mail back to the sender easily). Things change over time and so the naming, but I will take care not to change the hotkey if possible. In addition, I have to amend the FAQ entry to add some comments on implications on having redirected mail identified as SPAM today since you are usually not allowed to sent mail with a foreign From:.

Nevertheless, the ticket is now accepted and I will adress it as soon as I am at my computer again.

​http://www.mail2web.com

Perhaps solves this (not noticed delivery issues) using

Sender: loggedinto@mailbox.net
From: "supplied@address.com" <eg:original@address.com>

Like Yam, before 2.8 removed the useful feature, you can put anything in the From: (except webmail addresses)

(In [6547]) * YAM_WR.c, mui/WriteWindow.c, misc: renamed the 'Bounce' mail functionality

for redirecting emails to alternative recipients to 'Redirect' as that
better reflects the purpose of this functionality and should not confuse
users anymore. Also adapted the functionality to add all well-known
Resent-#? headers to redirected emails. This should adapt YAM to be somehwat
more RFC compliant. Furthermore, a Resent-CC and Resent-BCC can now be
specified. In addition, YAM will now allow to bounce to multiple emails in
one operation. That means, a user can now select more than one mail in the
mail listview and when a redirect operation is performed YAM will redirect
all of these mails in one run. This change should perfectly fix, fulfill and
closes #362.