On Tue, 17 Mar 2015, Markus Reschke wrote to mark lewis:

 ml> remember, zone gating is a /netmail/ thing... it has nothing to do 
 ml> with echomail... echomail is not routed... zone gating is routing 
 ml> to a specific system that connects across zones...

 MR> What is the correct term for the process of echomail leaving a node
 MR> in one zone and entering a node in another zone?

it isn't zone gating... there is no term for it unless the echomail is crossing
between different FTNs (eg: fidonetagoranet) which is plain simple gating as
far as i can remember right now at 0700 with no c0ffee... echomail crossing
between zones in the same FTN is simply echomail crossing between zones...
there's nothing special about it...

 MR> SEEN-BYs are 2D addresses.

in a majority of packages, yes... there are some that have 3/4/5D but i they
are using a different header word...

 MR> Of course a nodelist without any duplicate net numbers is a 
 MR> solution ;)

there never really was a problem... stripping the seenbys was ok AFAIK...

 MR> But the old way is to strip all SEEN-BYs when receiving an 
 MR> echomail from another zone while distributing that echomail to 
 MR> nodes within the local zone.

yes... just remember that zone gating is/was specific to netmail only and
followed a specific procedure in addressing to arrive at and pass through the
gateway... zone gating is/was used for passing netmail from zone to zone within
a FTN (eg: fidoZ1fidoZ2) as well as between FTNs (fidonetagoranet)...
even in cases where two different FTNs has over lapping zone numbers...

)\/(ark