Spam filtering bcps [was Re: Open Letter to D-Link about their NTP vandalism]

Wed Apr 12 12:11:49 UTC 2006

Suresh Ramasubramanian wrote:

>On 4/11/06, Matthew Black <black at csulb.edu> wrote:
>  
>
>>Are you suggesting that we configure our e-mail servers to notify
>>people upon automatic deletion of spam? Frequently, spam cannot be
>>properly identified until closure of the SMTP conversation and that
>>final 200 mMESSAGE ACCEPTED...or do you think that TCP/IP connection
>>should be held open until the message can be scanned for spam and
>>viruses just so we can give a 550 MESSAGE REJECTED error instead of
>>silently dropping it?
>>
>>    
>>
>
>You can reject right after DATA, at the <CR><LF>.<CR><LF> stage, before QUIT
>
>That's still an in line smtp reject rather than an accept + bounce DSN.
>
>Exim with the spamassassin patches (sa-exim) does this, for example.
>
>-srs
>  
>
Of course Postfix can be setup (using spampd) with spamassassin to do 
exactly the same.

I believe Sendmail+MimeDefang+Spamassassin will also reject inline if 
set to do so.

Regards,

Mat