On Sat, 01 January 2000, "Steven J. Sobol" wrote:
What I was referring to was a situation where the domain does exist in the root nameservers but the authoritative nameservers are unavailable.
So .COM exists in the root servers? How do you decide to treat second level domains (i.e. donelan.com) versus third level domains (i.e. www.donelan.com) versus third level domains under country code domains.
I'll take a stab at this: Attempting to resolve a.b.c.d.e.f.g.h.i If you get back a return value from DNS that says "Authoritative answer, a.b.c.d.e.f.g.h.i does not exist" Bounce the mail. If you get back a return that says "Resolving a.b.c.d.e.f.g.h.i timed out without a return" Queue the mail. This also works for i, h.i, g.h.i, f.g.h.i, etc. Owen