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

Joe Maimon jmaimon at ttec.com
Wed Apr 12 13:11:54 UTC 2006




Matthew Sullivan wrote:

> 
> 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
> 
> 

As will sendmail+spamass-milter+spamassassin

In fact there are quite a few milters that can be used in between 
sendmail and spamassassin

Joe



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