Jim Lang:
> OK here is the scenario.
>
> Spammer sends mail to: [email protected] from forged address
> [email protected]
>
> If [email protected] is delivered locally, not a problem, if the
> address is invalid, postix rejects the mail during the smtp connection.
>
> But if [email protected] is an alias to [email protected],
> postfix accepts the mail as deliverable and forwards it to hotmail.com.
>
> But if [email protected] 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 [email protected] -- backscatter.
>
> Is there a way to stop this?
Yes. Don't forward SPAM.
Wietse
