>- The reason the mail looks funny is that it predates the Internet; some of what you see is Arpanet mail, and some (like the first one) is internal ITS mail.

>- The reason the mail looks funny is that it predates the Internet; some of what you see is Arpanet mail, and some (like the first one) is internal ITS mail. Looking at https://datatracker.ietf.org/doc/html/rfc733 https://datatracker.ietf.org/doc/html/rfc733 @ was already used behind the scenes in its current meaning, we're probably seeing a nicely human readable version of the emails sent. Note I did not have the time to read the whole RFC and the above may be wrong.