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Re: the "implicit-MX" rule and a proposed BCP

2004-02-14 15:41:29
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Alex van den Bogaerdt wrote:


- The resulting addresses MUST have PTR records, and these PTR records
 MUST match the host.  The following lookups will still work but are
 discouraged:
 somehost -> a.b.c.d; a.b.c.d -> otherhost; otherhost -> a.b.c.d

 The following will NOT result in a valid lookup:
 somehost -> a.b.c.d; a.b.c.d -> otherhost; otherhost -> p.q.r.s

This implies that I cannot run a mail server on a cable modem. This is uncool. The reason is that the a.b.c.d -> otherhost which typically doesn't map to anything.

You have to allow for the case where the a.b.c.d is administratively controlled by someone other than the system administrator.

Philip
--

Philip Gladstone
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