domain lookup results

[Phil Steinke]

In article <nBR_4.10$Ai.1093 at burlma1-snr2>, Barry Margolin wrote:
>It sounds like you're using NSLOOKUP for your lookups.  Don't do that,
>since it produces ambiguous output and different output for equivalent
>responses.  It reports "Non-existent host/domain" even when the name exists
>but doesn't have any records of the requested type.

Ok, I played with dig a bit and it looks spiffy.  My main concern was that
our sendmail setup was configured to only allow mail from valid domains, and
for some that we knew were good (like cadence.com and ee.ualberta.ca) it was
still rejecting mail.  We've turned the feature off and are using the RBL
and procmail to help block spam, but I'm still curious as to why it was
rejecting them in the first place.  Perhaps I'll turn the logging levels way
up and watch what kind of lookup requests sendmail is using.

Phil