⁵The email addresses were not particularly friendly though, as to reach someone, you had to know the UUCP name of every intervening system, which led to email addresses such as cs9h6msm!swanpyr!ukuug!amsvax!uunet (which is incidentally an invented email address, which may bear some resemblance to my 1987 email address). Sometimes, you would quote several possible email addresses to give several possible paths to your machine. It wasn’t an ideal solution.