When a spam email is detected, it logs it as spam and then prevents the email from being delivered, but it then sends a NDN to the sending address (which is 9/10 a fake address).
I would like it to not send the NDN, if the email is sent to an invalid address, or it is detected as spam.
The email server is running on avalon.am-ul.com, running CE 10. It receives email for two domains, am-ul.com and meidomus.com
The following is in /etc/mail/local-host-names
mail.am-ul.com
avalon.am-ul.com
mail.meidomus.com
meidomus.com
am-ul.com
Can someone help here?