sa_dsn_cutoff_level,D_REJECT, multiple recipients

[Fabio Sangiovanni via amavis-users]

Hi list,

I have a pre-queue configuration based on 
postfix, amavisd-new (2.8.0) and 
spamassassin. I use amavisd for spam 
checks only.
final_spam_destiny is D_REJECT and I have 
one recipient (postmaster at mydomain.tld) in 
bypass_spam_checks_maps

1) when I receive spam with multiple 
recipients including postmaster, the 
message is not rejected (client doesn't 
get a 5xx, as per D_REJECT setting): it's 
accepted and delivered to postmaster, 
while the sender gets a DSN from amavisd 
for the other recipients. Is this the 
intended behaviour (it seems more like 
D_BOUNCE in this situation)?

2) in the previous scenario, I can't 
control DSNs with sa_dsn_cutoff_level. 
They are always sent. Is it ignored when 
using D_REJECT? is it being considered 
with D_BOUNCE only?

3) my ultimate goal is to whitelist 
postmaster's address when it's the only 
recipient - that is: I'd like to reject 
spam in every scenario different from 
postmaster being the only recipient. Is 
this possibile? Given 1) and 2) I ended up 
with a solution that generates 
backscatter, and I can't manage to do 
otherwise.

Thanks for your support!