Altering the envelope-from would solve this problem, but would circumvent SPF as you suggest. What you might do is use your mail from to send the mail and then use SRS (Sender Rewriting Service) to redirect bounce messages to other domains, but I don't know of a simple solution for setting that up.
Altering the envelope-from would solve this problem, but would circumvent SPF as you suggest. What you might do is use your mail from to send the mail and then use SRS (Sender Rewriting Service) to redirect bounce messages to other domains, but I don't know of a simple solution for setting that up.