Here's a small CLI utility I built: #Outis fights spam by generating and sending a fake "user unknown" bounce for an email you received, so the sender believes your address does not exist.
This should work well for the recent trend of AI-generated automated emails, where the sender may expect a reply; it helps to clean your email from their list.
But it's also useful for dealing with annoying contacts :)



I've been using it for 3 weeks, and the noise seems to have decreased slightly.

More info, sources and linux/mac/windows binaries:
https://github.com/dtonon/outis