On 13/03/2014 00:37, Robert Elz wrote: > The UK and NO links were really arpanet links, not internet, and > were subject to all of the arpanet restrictions. For example, I am > reasonably sure that mail from janet users to arpanet users did not > travel over the arpnet's UK link. I suspect the same was true of Norway. UK email followed a number of gateways to reach Internet, each performing the required address inversion from NRS to Host/DNS. Amongst the gateways was uk.ac.uk.cs.nss which performed address conversion and which sent emails across the Atlantic via SatNet to ames.arc.nasa.gov Kind regards, Olivier