Mail blocking - was Re: [plug] Spam from The Maverick Partnership

[Grahame Bowland]

On Thu, 2001-12-13 at 15:38, Matt Kemner wrote:
> 
> On Thu, 13 Dec 2001, Bret Busby wrote:
> 
> > Wouldn't it be more appropriate, to just silently drop the packet, so
> > that the spammer can't trace the party blocking the message?
> 
> Better to let the SPAMmers know that you are not an open relay, so they
> will go away and try elsewhere, rather than make them think it WORKED, in
> which case they go and tell all their buddies they just found another open
> relay.. Then watch your modem link get flooded...

I think you're getting confused..

There's a big difference between being an open mail relay and accepting
mail addressed to valid local domains/accounts. That doesn't imply
you're an open mail relay at all.

BTW: if you ever want amusement, you can put amusing error messages into
Postfix maps, so you can have "550 Take your steenking HTML mail
elsewhere" if you're feeling particularly harsh and can find a nice way
to block HTML mail based on the headers :-)

-- 
Grahame Bowland                       Email: grahame at ucs.uwa.edu.au
University Communications Services    Phone: +61 8 9380 1175
The University of Western Australia     Fax: +61 8 9380 1109
                                     CRICOS: 00126G