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Re: I-D Action:draft-klensin-rfc2821bis-10.txt

2008-04-15 12:28:21

Hi Arnt,
At 11:32 15-04-2008, Arnt Gulbrandsen wrote:
Yes, and the IPv6-only relay would then connect to and issuing the conversation that ends with 550.

Not necessarily. That host may apply a different policy for mail coming through the other MX hosts. Otherwise, it would cause backscatter. BTW, the problem may be applicable to IPv4 as well.