> On Mar 8, 2019, at 11:02 AM, Wietse Venema <wie...@porcupine.org> wrote:
>
> Perhaps sender_dependent_default_transport_maps uses the same
> null-sender lookup mechanism as other mappings. For example the
> transport map has this note:
>
> Note 1: the null recipient address is looked up as
> $empty_address_recipient@$myhostname (default: mailer-daemon@hostname).
Yes, it looks like it is.
My concern was more about the OP's relay, it may simply refuse all bounces.
In which case the OP may want to configure a suitable double-bounce sender,
and test that double-bounce delivery works.
--
Viktor.
