Yes, I looked at that, but AFAICT that is all about blocking INBOUND backscatter spam, not stopping outbound messages.
On Jul 11, 2021, at 10:15 AM, Kevin N. <ke...@notscheduled.eu> wrote: > This might help: http://www.postfix.org/BACKSCATTER_README.html > > Cheers, > > K. > > >> On Jul 11, 2021, at 9:58 AM, Wietse Venema <wie...@porcupine.org> wrote: >>> Ron Garret: >>>> I have recently come under a backscatter spam attack from one >>>> specific domain. This domain has blacklisted my server?s IP >>>> address, and so bounce replies sent to this domain are piling up >>>> in my mail queue and I have to go through periodically and manually >>>> delete them. I don?t want to disable bounce messages in general >>>> because I don?t want incoming messages with typos in the destination >>>> address to just vanish into the cosmic void. Is there a way to >>>> disable bounce replies for a specific domain? >>> >>> Why is your server sending bounces (or any other email) to that >>> domain? >> Because spammers are sending messages with forged return-path headers to >> invalid addresses on my server. It’s called backscatter: >> https://en.wikipedia.org/wiki/Backscatter_(email) >> It’s actually possible that I’m sending backscatter spam to other domains, >> but only one has blacklisted me so far. >> rg
