Wietse Venema wrote:
Jim Lang:
OK here is the scenario.
Spammer sends mail to: u...@myclientsdomain.com from forged address
vic...@randomdomain.com
If u...@myclientsdomain.com is delivered locally, not a problem, if the
address is invalid, postix rejects the mail during the smtp connection.
But if u...@myclientsdomain.com is an alias to mycli...@otherserver.com,
postfix accepts the mail as deliverable and forwards it to hotmail.com.
But if mycli...@otherserver.com can for whatever reason not be
delivered, otherserver.com does what it is supposed to do and rejects
the mail during the smtp connection, which causes postfix to send out a
non-delivery report to vic...@randomdomain.com -- backscatter.
Is there a way to stop this?
Yes. Don't forward SPAM.
Wietse
And how do I do that in this scenario?
