Is there any way to either set the "From" of a message, or "remember" what the user selected in a previous instance of MailComposer? I have users with multiple email accounts. They say in other mail instances, once they set the the "from" in the email itself, it "remembers" which from they were using, at least until the next reboot.
It is not possible to set the from message or make it remember the last set value. Maybe the other app was a system app which has more control over the composer.