Ask Slashdot: Spoof an Email Bounce With Windows?
An anonymous reader writes "One cool feature I used on KMail years ago was the ability to generate a spoofed email bounce for any given message I had received, which claimed delivery failed because of an unknown recipient. While this doesn't exactly align with expected behaviour from a mail client, it was a useful way of easily getting off mailing lists (automated, or manually created by freaky acquaintances!). This is something I really miss, so I'm wondering if there are any mail clients for Windows that provide similar functionality?"
Maybe you should switch back to a system that makes it easier to do more advanced types of things instead of a car with the hood welded shut.