On Thu, Jul 11, 2019 at 09:44:53PM +0200, Patrick Ben Koetter wrote:
> > > I'd like to configure postfix to send bounce notification via another
> > > host:
> >
> > Why should bounces follow a different path than non-bounces?
>
> Because bounces get a different rating on the receiving than 'regular' mail
> and this might have a negative influence on the outbound IP that is used for
> sending 'regular' mail.
This somewhat true, but a system sending *only* bounces is then
much more likely to get a very negative reputation, resulting
loss of the bounces. So on the whole, I'd say:
* Configure your system to avoid the need to send bounces most
of the time. Bounces should be infrequent.
* Send the bounces in the same way you send regular email,
making their delivery more reliable. After all, this is
the (legitimate) sender's last chance to learn his message
did not get delivered to the intended recipient.
--
Viktor.
