This is a good use case for SPF. If your mail server has an SPF record, you can reliably filter out real bounces from forgeries. (I read all my bounces, and would much rather have you bounce my mail than stick it in a spam folder.)
Copyright © 2017, Eklektix, Inc.
Comments and public postings are copyrighted by their creators.
Linux is a registered trademark of Linus Torvalds