[dns-operations] Why would an MTA issue an ANY query instead of an MX query?

[sthaug at nethelp.no]

> What about rate limiting clients which are not keeping the TTL value?
> We are talking about rate limiting on authoritative name servers, right?

Not *only* on authoritative name servers. It is also relevant for
recursive name servers.

Steinar Haug, Nethelp consulting, sthaug at nethelp.no