Hi Wietse!
Thanks for your quick response.
Of course, I'm aware that smtpd cannot sent mail - I was just a little
bit imprecise there. I should have said: "An smtpd which receives the
mail from internal systems for sending out to the internet" :)
I found a wiki entry about a hold transport, but
Jens Hoffrichter via Postfix-users:
> Hi!
>
> We are running a pretty big postfix installation for a big corporate customer.
>
> Next week, there are migrations in the backend for some mailboxes, and
> the inbound mail for these mailboxes should be put on hold on the
> postfix directly before it
