Victor Duchovni:
> On Mon, Nov 08, 2010 at 03:29:49PM -0500, Wietse Venema wrote:
>
> > Luiz Antonio Emerenciano Alcoforado:
> > > Like that : Mach1 --> Mach2 --> Mach3 --> Mach4 --> Mach5 (same link as
> > > Mach1)
> > >
> > > Thus, when the problem were raised by the faling link, Mach1 will
> > > forward the pending emails to Mach2 and they could be sent.
> >
> > When all links are down, you have a loop
> >
> > 1-2-3-4-5-2-3-4-5....
> >
> > going at local network speeds.
>
> The right solution to this problem is a packet routing solution,
> not an SMTP message routing solution.
Like setting the default route to the "right" gateway. That would
be robust only if those gateways perform network address translation,
otherwise who knows what path the return packets will take.
Wietse
