The way to do this forwarding would be to remail it in the same way that mailing lists do, rather than a SMTP forward.
The sender (SMTP envelope sender) gets rewritten, and so SPF is good. The From: header stays the same. SPF doesn't care about the From: header, only the SMTP envelope sender.
The way to do this forwarding would be to remail it in the same way that mailing lists do, rather than a SMTP forward.
The sender (SMTP envelope sender) gets rewritten, and so SPF is good. The From: header stays the same. SPF doesn't care about the From: header, only the SMTP envelope sender.