Frank Cox wrote: > On Wed, 31 Oct 2007 12:05:11 -0500 > Les Mikesell <lesmikesell gmail com> wrote: > >> You must have a real domain name to send email. > > Is there any technical reason (other than "we hate spammers") why email can't > be sent to an IP address instead of a domain name? > > I know that mail sent to joeblow 123 456 789 001 doesn't work, but have never > really understood why... > I think this is because TCP/IP is not the only transport mechanism for e-mail. It is just the most common one now. Also, the same IP address may receive e-mail for more then one host, or be a relay for the real host. The host pointed to by the DNS records may be a server that then forwards the mail to the "real" host using another transport mechanism. Mikkel -- Do not meddle in the affairs of dragons, for thou art crunchy and taste good with Ketchup!
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