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Re: domain name definition in RFC2821

2006-04-22 10:05:36

On Sat, Apr 22, 2006, John C Klensin wrote:

Note that this pair of productions have been tentatively changed
to:

   Domain = (sub-domain 1*("." sub-domain) ["."] ) /
                     sub-domain["."]

This is breaking existing implementations that perform strict syntax
checks.  Why is it necessary to allow a trailing dot suddenly?

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