On Sat, 15 Mar 2003, Florian Weimer wrote:
> > If, for example, I was blocking your IP in some way, and you tried to
> > get around my block by trying to deliver through a backup MX, your IP
> > would go straight into our firewall deny rules.
>
> Hmm, would you mind looking up the way SMTP is supposed to work? MTAs
I think Suresh knows how SMTP is supposed to work ;)
> are expected to work this way. If no IP connection can be made to the
> first MX, other MXes should be tried. As a result, SMTP mail delivery
> is extremely robust, and certainly you don't want to change this.
The IP connection was established if you get the 5xx response. Sorry but
what you describe is a usual spammer-practice. The connection was rejected
on SMTP-Level, not IP-Level.
