For those who aren't familiar with this, up until the mid-1990s or so, Sun let individual engineers name their own workstations. In fact many regarded this as a privilege. Each workstation ran its own copy of sendmail, so one's email address was login@hostname. People came up with all kinds of clever login/hostname combinations, such as what Don mentioned, eat@joes.

My all time favorite was Rich Burridge's, whose workstation was named "stard". Since his login was richb, his email address was...

richb@stard