[pmg-devel] [RFC pmg-api 4/4] add support for before queue filtering

[Dietmar Maurer]

> On 14 November 2019 08:34 Dietmar Maurer <dietmar at proxmox.com> wrote:
> 
>  
> > We can only reply with 554 (permfail) if all recepients are blocked.
> > In the case that some accept the mail, we reply with 250 OK and generate bounces
> > for all blocking recepients by default. (This is also the behavior that postfix
> > has when not enabling receiver verification and the downstream server rejects
> > recepients).
> > 
> 
> IMHO this is the wrong approach. We must never sent NDR with this setup.

OK, after discussion Dominik convinced me that this is the best we can do.