[Asrg] On assertions

[der Mouse]

>> I thought "MX 0 ." asserted not "we send no mail" but rather "we
>> receive no mail".
> [I]f a domain can receive no email then it's certainly not sending
> any email it cares about, as there's no way for it to receive any
> bounces.

I'm not quite sure the implication is valid, unless you define "cares
about" in such a way as to make it a tautology.  Mail that is of
substantially greater value to the recipient than the sender does
exist, even though most anti-spam work tends to focus on mail for which
the value inequality goes the other way.

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