[Dovecot] deliver rejection bounces

[Giuliano Gavazzi]

On T 20 Jan, 2009, at 12:38 , Steffen Kaiser wrote:

> So you can hack sendmail. Exim, too, if I remember correctly.

I would not call that hack in exim case though. It is possible to  
avoid all backscatter, first of all by avoiding delivery by an  
external programme*. This will still leave the possibility of a  
failure in forwarding, but by changing the envelope sender to the  
local administrator address (setting errors_to in the delivering  
routers) even a failure in forwarding will only cause a locally  
delivered failure report. There is no excuse for backscatter and  
whoever causes it will likely and rightly end up in some blacklist,  
local or distributed, sooner or later.
Giuliano