On Wed, 30 Oct 2013, Benny Pedersen wrote:

Adam Moffett skrev den 2013-10-30 22:18:

I do enjoy a good educational argument though.

domains needs a tld to be valid, ip addresses have no tld, so domain not found is what postfix and other mta sees

but postfix and possible other mtas allow *@[1.2.3.4] as sender/recipient envelope

RFC-2821 section 4 lists the correct syntax of IPv4 & IPv6 address literal
components of valid recipient addresses.

   name@[12.34.56.78] is a valid email address using IPv4 address literals

   name@12.34.56.78   is -not- a valid email address (unless there's a new
   TLD named "78" ;).

--
Dave Funk                                  University of Iowa
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