[Asrg] where the message originated (was: DKIM role?) (SM)

[Ian Eiloart]

--On 10 January 2009 21:18:34 -0600 Gordon Peterson <gep2 at terabites.com> 
wrote:

> While we're talking about the issue of antispam nuisances, another is the
> situation where a spam blocker inadvertently serves as an "IP address
> laundering agent" when they bounce back a message detected as containing
> spam, or a virus.  It is particularly stupid to bounce back a message
> because it is detected to contain a virus WHICH IS KNOWN TO FALSIFY OR
> COUNTERFEIT THE RETURN ADDRESS!

Actually, it occurred to me that we have mechanisms whereby domain owners 
can prevent abuse of their domains (SPF and DKIM). Therefore, we should 
feel free to bounce email to any domain owner the doesn't deploy SPF and 
DKIM - in order to encourage them to do so. Of course, bouncing email is 
also OK when you find an SPF or DKIM match.

-- 
Ian Eiloart
IT Services, University of Sussex
x3148