On Tue, 25 Nov 2025 at 21:50, Al and Jeanie Zick via Postfix-users <[email protected]> wrote: > > Maybe someone has some ideas on this. My inbox is full of bounces, thousands > ever day. I check my logs and these emails are not going through my mail > server. I also updated my config but there was no change. It looks like some > spammer sends an email, then a real mail server accepts it, then decides it > can't deliver it, and then it bounces back to me. Checking my server logs > shows > that it is returned from a different server every time. Also, it was sent from > a random email of mine. Is there a defense against this kind of attack? Can I > somehow limit it so only my mail servers can send emails for my domains? Or is > there a way to block the bounces?
You can try https://www.backscatterer.org/?target=usage See the instructions for "safe mode" in postfix on that page - so this blacklist will be used only for bounces and not other email. _______________________________________________ Postfix-users mailing list -- [email protected] To unsubscribe send an email to [email protected]
