Christian Ro??ner:
>
> > Am 24.01.2017 um 12:48 schrieb Wietse Venema <wie...@porcupine.org>:
> >
> > Maybe you can start with a "null" proxy and smtpd_proxy_filter,
> > and add some modifications to the SMTP command stream based
> > on sender.
>
> Not sure, if I totally understand. Null-Porxy meaning postfix
> process with smtpd_proxy_filter option connecting directly to
> second postfix listener?
>
> I fear that would not work here.
[milter stuff omitted]
Then why not do this in Milters? The Postfix ADD_RCPTPAR
implementation supports NOTIFY and ORCPT parameters (delete the
old recipient and add it back with appropriate DSN options).
Wietse
