Al and Jeanie Zick via Postfix-users: > Hi, > > 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?
Do you have a wild-card pattern that accepts email for *every* address in your domain? Stop doing that. https://www.postfix.org/BACKSCATTER_README.html has some ideas for sites that don't use wildcard patterns. Wietse _______________________________________________ Postfix-users mailing list -- [email protected] To unsubscribe send an email to [email protected]
