Author: James P. Roberts Date: To: Suresh Ramasubramanian, Florian Weimer CC: exim-users Subject: Re: [Exim] Reaction to rude 554 greeting
<snip> > > 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
> 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.
>
But an IP connection WAS made to the first MX, and a 5xx response was made.
That is NOT the same as "no IP connection."
