[exim] Re: bounce messages and their potential misuse

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?