Hi,
On of our clients is complaning that her mails are not answered. 
But the recipients never got her mail. 
The clients mailserver is a SME 6 contribs version that is connected to the internet via ADSL with a dynamic IP address. 
Our logfile /var/log/smtpfront-qmail/current shows: 
rblsmtpd: 62.xxx.xxx.xx pid 27710: 451 Dynamic IP Address See: 
http://www.dnsbl.sorbs.net/lookup.shtml?62.xxx.xxx.xxAllthough a smtp error is raised, no mailer deamon delivery error message is returned to our customer.
Both sides use the SME 6 contribs version. 
How to enable that this kind of rejected email generates a mailer deamon delivery failure notice?
Cheers
sqlerror