>Looking at the digests you linked '80-'84. Does anybody still use .arpa >domains for their email? You can write to me at johnl@xxxxxxxxxxxxxxxxxxxxxxxx and it will work, but I suspect that's not what you had in mind. All of the remaining subdomains in .arpa are listed here: https://www.iana.org/domains/arpa I don't see anywhere that there might be an MX record other than us passive aggressive rDNS operators. R's, John