Dieter Modig:
> said: 450 Requested mail action not taken: mailbox unavailable (in reply
> to RCPT TO command))
Wietse:
> That is NOT a Postfix error message. To fix this, look at the OTHER
> mail system whose name and IP address you helpfully deleted.
Dieter Modig:
> they have a malfunction how can it work with one of my users and not the
> other when both are sending to the same recipient?!
If you wonder why the OTHER system gives replies that depend on the
sender address, then look at the OTHER system.
Wietse
