Re: REJECT mails to a specific domain -> ERROR mail to postmaster

[Wietse Venema]

Michael Weissenbacher:
>  In:  MAIL From:<newslet...@somedomain.com> SIZE=28675
>  Out: 250 2.1.0 Ok
>  In:  RCPT To:<bla...@olddomain.com>
>  Out: 451 4.3.5 Server configuration error

Oops. You are getting postmaster noticifications because of the
"Server configuration error".  See the maillog file for details.
You need to fix that regardless.

        Wietse