What is a ARPA email address? I've never heard of it. Did they look different from normal SMTP email address used today? Or was it like your email server just supported ARPA and not SMTP.
I was gumby@MIT-AI.ARPA. By then mail used SMTP but the arpanet had not yet transitioned to IP/TCP.
Those .ARPA names were part of a lengthy transition to the DNS; before this I was just gumby@mit-ai or just gumby@ai
The ARPA. TLD isn’t used for hosts any more but has been repurposed mainly for network database lookups. Yes, the `.` after the TLD is there for a reason.
