Re: delivery status notification - disable

[Andrew Daviel]

On Sun, 6 Jan 2008, Marius Vochin wrote:

>  Can you tell me, please, how can I discard a spam message?

I thought the whole point of the milter was that it generated reject 
status rather than discarding, so that a legitimate user who had tripped 
spamassassin e.g. by mailing a photo with no personal name would be 
notified, but that direct-to-MX spam would not be returned to bogus 
return addresses.

I'm not quite sure why you were seeing a DSN. Normally, the sender's MTA 
generates a DSN (which you don't see), but if the sender is a virus or 
spambot, it won't bother.
I had noticed, though, that if a local mail forward (via .forward or 
aliases) exists, that the local sendmail will generate a DSN if the 
forwarded mail fails. So if a spam falls under our threshold, and we 
forward it to another site with a lower threshold, and that site gives 
reject status, our sendmail generates a DSN to the (probably forged) 
return address.

I can't recall if spamass-milter has a setting to discard mail (i.e. 
issue an "accept" 2xx status, then drop the mail). If not, turn off the 
milter and use e.g. a procmail filter to discard mail with the spam flag 
set.


--
Andrew Daviel, TRIUMF, Canada
Tel. +1 (604) 222-7376  (Pacific Time)
Network Security Manager