We run a Postfix server which handles email for a number of our
customers domains. Most have mailboxes on the server, which all works
fine, but the problem is for domains where the mail is forwarded to
another server. This can cause our server to generate backscatter,
which I would like to stop.
The problem happens when a piece of spam is sent to
us...@ourcustomer.com from anoth...@forgeddomain.com. This is
forwarded to us...@ultimatedestination.com. The ultimatedestination.com
server rejects the message (normally due to a spam filter), which
causes our server to generate a bounce message sent to
anoth...@forgeddomain.com.
I would like to prevent that bounce message being generated, and only
send bounce messages to local users, but I can't find an appropriate
setting to do so. I've read http://www.postfix.org/BACKSCATTER_README.html
but that seems to be only telling me how to stop receiving
backscatter, not sending.
Am I being stupid? I can't be the only one wanting to do this.
Thanks in advance.
Rob
Hi, the one way I fould to stop Backscatter was to use DISCARD instead
of REJECT.
You can check this post here http://taint.org/2007/05/30/164456a.html
(the last comment is mine). Maybe you'll find it useful.
Good luck.