> On December 14, 2007 at 06:35AM G.W. Haywood wrote:

> > The clamav-milter manpage says
> >
> > "-Q, --quarantine=EMAILADDRESS
> >   If this e-mail address is given, messages containing a virus  or
> >   worm are redirected to it."
> >
> > However it doesn't say that if you use this option then infected mail
> > will be accepted rather than rejected.  I don't see why it should be
> > necessary to accept infected mail under any circumstances...
> 
> From the replies to my message it appears that there may be some
> misunderstanding of what I meant.
> 
> To decide whether to accept or reject a message because of its content
> it is first necessary to read it.  It is perfectly possible to allow a
> complete mail message to be transmitted to a recipient server, store
> it for future reference if required, send it (or not) to any desired
> recipients (including or excluding the original addressees), and then
> reject it with the appropriate SMTP code.
> 
> When a message is rejected it means that the sending server still has
> the responsibility for it, and the recipient server has met all its
> obligations.  Personally, I feel happier that the server that tried to
> send me a fraudulent mail still has possession of the danged thing,
> and has to do more work to deal with it, even if it means that it will
> continue trying to send it to me for another five days - as many do -
> before sending it back where it came from.  Hopefully if it fills all
> its available capacity with that crap then a bit less will propagate
> around the Internet, and perhaps a few incompetent, irresponsible or
> criminal system managers will at least be put to some inconvenience.
> 
> I store and reject mail all the time, mostly fraudulent messages which
> I then send to the Metropolitan Police:
> 
> http://www.met.police.uk/computercrime/

I believe that it is worth mentioning, that the receiver of said messages must
insure that they do not engage in the practice referred to as "backscatter".

http://en.wikipedia.org/wiki/Backscatter#Backscatter_of_email_spam

An improperly configured system could lead to this problem.


-- 
Gerard
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