Server has been added to a backscatter database. So I would like to disable the sending of NDR emails, specifically "Undelivered Mail Returned to Sender"
I have read various things online, and neither of these work:
1) Adding this to /etc/postfix/master.cf
bounce unix - - n - 0 discard
1) Adding this to /etc/postfix/header_checks doesn't work (and header_checks is enabled in main.cf)
/^Content-Type: multipart\/report; report-type=delivery-status\;/ REJECT no third-party DSNs
/^Content-Type: message\/delivery-status; / REJECT no third-party DSNs
So how does one just stop sending these please, so we can not be added to backscatter databases?