Re: forged email DSN

At 02:29 PM 2/26/05, you wrote:
> On Sat, 26 Feb 2005, Brian W. Antoine wrote:
>
> >   I believe you're underestimating what the response to getting a flood
> > of DSN's from your server will be, even if most of them get rejected, but
> > that's your call to make.
> Starting to send a DSN to see if it would succeed (CBV) is a very common
> email authentication technique.  Verizon is a large ISP that uses it.
  Verizon also gets blocked because of it and it just adds to the damage
to their reputation.