Follow official postfix page (http://www.postfix.org/DSN_README.html) I've:
smtpd_discard_ehlo_keyword_address_maps = cidr:/etc/postfix/esmtp_access
cat /etc/postfix/esmtp_access
# Allow DSN requests from local subnet only
192.168.1.0/24 silent-discard
0.0.0.0/0 silent-discard, dsn
::/0 silent-discard, dsn
I've small lan on 192.168.1.0 and all clients uses a single smtp postfix
server.
On clients, send the emails with "delivery status notification" option.
After sent, postfix send me a delivery status notification:
Successful Mail Delivery Report
but that email is within postfix queue (why I stopped destination over
internet smtp server - purpose test).
So, my postfix server always send a delivery status notification also if
there's a transmission problem.
What's the error?
thanks!
Pol
