Am 26.09.2014 um 17:44 schrieb Klaipedaville on Google:
There are countries for example Germany where it is prohibited by law to discard any email messages silently. You must reject them so that the senders would be aware what is going on. I was told that by one German admin. I am not sure if this is really true but it has some logic on one hand
it is true and besides the german legal letter below you violate a second law at the same time - that is why you have to run a spamfilter *before queue* and sa-milter exists - in case you reject a message the sending server is responsible for a bounce
in case you accept and silently drop it you have a unacceptable configuration - independent of laws - in case of a important and time critical mail i need to know it was rejected and so can call the person by phone or try to remove something which triggered a false positive
there are two important rules for mail:
a) if you accept it you have to deliver it b) if you can't deliver it you must not accept it
if you follow b) you don't become a backscatter
http://www.postfix.org/MILTER_README.html
§ 303a StGB - Datenveränderung (1) Wer rechtswidrig Daten (§ 202a Abs. 2) löscht, unterdrückt, unbrauchbar macht oder verändert, wird mit Freiheitsstrafe bis zu zwei Jahren oder mit Geldstrafe bestraft