Re: Last Call: draft-klensin-rfc2821bis (Simple Mail Transfer Protocol) to Draft Standard (4)

[John C Klensin <john-ietf at jck.com>]

--On Tuesday, December 11, 2007 2:26 AM +0100 Frank Ellermann 
<nobody at xyzzy.claranet.de> wrote:

> | Domain         = ( sub-domain 1*("." sub-domain) ) /
> | sub-domain
>
> The new part is the added <sub-domain> alternative.  The
> original fix proposed four years ago was to drop the "1":
>
> | Domain         = sub-domain *("." sub-domain)
>
> IMO the latter is clearer, OTOH the long version makes
> the modification more obvious.  I forgot to mention this
> point in my ABNF comment, and maybe it illustrates that
> 2821bis is important for the Internet at large.  We even
> worried how that might affect the root servers.

It doesn't affect the root servers, although it might affect the 
TLD servers.

  john




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