Author: Isaac Close Date: To: Hampshire LUG Discussion List Subject: Re: [Hampshire] SMTP bounce
--- On Wed, 25/11/09, Hugo Mills <hugo@???> wrote:
> On Wed, Nov 25, 2009 at 05:55:05AM
> -0800, Isaac Close wrote:
> > Personally, I always configure my email services to
> reject unknown
> > recipients, don't really need to elaborate why.
> >
> > Is it becoming common practice to sliently drop
> messages instead of
> > bouncing them (because of forged return-paths) ?
>
> Yes. If you send a bounce message for
> unknown recipients, you get
> used for backscatter attacks, where the spammer forges the
> source
> address, sends mail to a false destination address at your
> site, and
> the bounce ends up where they want it to go.
> Thats what I had suspected.
> If you send bounce messages arbitrarily,
> without some fairly heavy
> anti-spam checking, you're a part of the spam problem
> (unwittingly or
> not).
>
Aye. Don't spose anyone knows a quick and dirty method to 'switch off' bouncing in Postfix ?
