Christian Strebel Hi Christian, I've already feared such a reply. I am intending to send the e-mail via Java anyway, therefore I was just fiddling around with the exposed and internal API of the mail step, but it doesn't seem like you'd be exposing the headers anywhere in 7.x.x.
The main reason why I need this is to implement a read confirmation which is configured by setting the X-Confirm-Reading-To / Return-receipt-to
headers.