Author: Peter Bowyer Date: To: exim users Subject: Re: [exim] Re: bounce messages and their potential misuse
On 30/03/06, Adam Funk <adam00f@???> wrote: > On 2006-03-30, Nigel Wade <nmw@???> wrote:
>
> > That only works for mis-configured MTAs. A properly configured MTA would reject
> > a message destined for a non-existent recipient. It would not accept it and then
> > generate a bounce message.
>
> But when MTA(n) rejects a message that MTA(n-1) is trying to relay,
> MTA(n-1) has to bounce it, right?
MTA(n-1) shouldn't accept messages to invalid recipients in the first
place. If it has no direct knowledge of valid recipients, it should do
callouts.
