I think that last one isn&#x27;t a modern standard email address -- the domain part is reversed. It&#x27;s a JANET NRS path (<a href="https:&#x2F;&#x2F;en.m.wikipedia.org&#x2F;wiki&#x2F;JANET_NRS" rel="nofollow">https:&#x2F;&#x2F;en.m.wikipedia.org&#x2F;wiki&#x2F;JANET_NRS</a>). The modern equivalent would be miw@ux.cs.man.ac.uk.<p>The first email address (the ARPA one) is presumably using a machine in UCL as the gateway between internet routing and JANET routing, since the part before the % is the JANET NRS component ordering. The obvious conclusion would be that the mail server he was using didn&#x27;t have an ARPAnet connection at all.