12 Feb
2012
12 Feb
'12
1:42 a.m.
Hi,
For SMTP specifically, the current specification is
also quite clear
(RFC 5321, section 5.1):
"The lookup first attempts to locate an MX record associated with
the name. If a CNAME record is found, the resulting name is processed
as if it were the initial name. If a non-existent domain error is
returned, this situation MUST be reported as an error. If a temporary
error is returned, the message MUST be queued and retried later (see
Section 4.5.4.1)."
Quite... and lack of any NS servers tends to be treated as a
non-existent domain.
Regards,
@ndy
--
andyjpb(a)ashurst.eu.org
http://www.ashurst.eu.org/
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