Am 24.11.2014 um 14:33 schrieb Matteo Cazzador:
Hi,i'm a novice i need to discard and not reject while i receive from
external domain to my mx server mail with this error
"Recipient address rejected: User unknown in virtual mailbox table;"
I don't want that a message (it is a really replay mail?) come back to
the sender of external domain.
Is it possible to disable this return message to the sender?
I neeed to reduce my server backscatter while sending 550 error to the
client.
But really my server send a email on the sender? I don't understand if
it is uppen.
what are you talking about?
a REJECT don't produce a backscatter
it's the clients job to generate a bounce or not
if you have a server in front of your postfix without a list of valid
RCPT then it needs to make rcpt-verification
(http://www.postfix.org/ADDRESS_VERIFICATION_README.html)
*never ever* discard messages while you signal "250 OK" to the sender,
it makes sane bounce-managment for senders impossible and at the same
time your MX to a loved spammer target because you accept anythiung
instead reject
