Two more potential (somewhat less good) solutions: 1: You can set smtpd_recipient_restrictions = permit_mynetworks, reject_unauth_destination, reject_unknown_recipient_domain
then your host will accept mail for existent-sub.domain.com but not non- existent-sub.domain.com (this is done by the reject_unknown_recipient_domain). Unfortunately, this will accept mail for any hostname that has an A record, regardless of if an MX is running there or not. 2: You can use the techniques described here: http://www.postfix.org/ADDRESS_VERIFICATION_README.html Unfortunately this uses a lot of resources and might get you blacklisted by more aggressive mail providers (or rather, mail providers that don't appreciate your particular variety of aggressiveness). -- default postfix config creates backscatter https://bugs.launchpad.net/bugs/242383 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to postfix in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
