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.

        Wietse

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