[Asrg] On assertions

[John Levine]

>I thought one indicated "we receive no mail" by establishing a valid
>MX record that points to a machine with the smtp port open and a
>silly little daemon that gives 552 errors in reply to all MAIL FROM
>commands listening on it.  (would that be a viable commercial
>service?)

Depends.  I know of some domains that get several thousand connection
attempts per second, all spam, when they have an MX.  How much
bandwidth does your daemon have and how many simultaneous connections
will it handle?