> However, the thing that keeps bothering me now is why DNS Report only
> expects a root MX record, and not a named MX record. If this is just a
> matter of convention, as I always believed, then they should be able to
> handle it both ways. If, however, I'm just ignorant and the root
record is
> somehow special, then I need to be more aware of this to avoid future
> problems. So how much of this is Standards, and how much is just
> convention?
It is 100% convention. It is perfectly acceptable to have a domain
example.com that has no MX record, and have a subdomain/hostname
mail.example.com that has an MX record. Because of convention, very few
domains do not accept E-mail to the main domain name. But there is
nothing that requires them to do so besides convention.
As for the DNS Report, it checks for the MX record because of convention
(since about 99% of domains want to accept E-mail to their domain
name). As for why it doesn't check your way, that's because it is
nearly impossible to do so. Specifically, the only way to find a list
of hostnames on your domain is to do a zone transfer on your domain --
and most people have now turned off zone transfers. So we can't just
look at a list of your DNS records and pick out the MX records.
-Scott
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