On Wed, 15 Apr 1998, Christopher Purnell wrote:
> Why is everyone misunderstanding me here? The order MX,A might be
> what is done for the original domain but A,MX is the order for
> unresolved targets of an MX lookup.
I don't know why, but I *am* misunderstanding you! The rule for handling
a domain is
Look up MX records; if found, each one points to a host name. Look up
the IP address(es) for each host so found (i.e. A records). The presumption
is that there is at least one. If not, the DNS is incorrectly set up.
If *no* MX records are found, then (and only then) look up an A record
for the original domain, and treat it as if there were an MX record
with preference 0 pointing to it.
I don't understand your comment "A,MX is the order for unresolved
targets of an MX lookup". I don't believe anywhere in the RFCs there is
anything about that.
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Philip Hazel University Computing Service,
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P.Hazel@??? England. Phone: +44 1223 334714
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