On Feb 25, 2010, at 01:35, Jared Earle wrote:
On Thu, Feb 25, 2010 at 7:22 AM, Brian Willoughby <[email protected]
> wrote:
I'm wondering if anyone has suggestions for how I can diagnose a rare
problem with my mail server. I have a feeling that it has
something to do
with the many-layered authentication system of Mac OS X Server, so
any help
would be appreciated.
Is Sendmail doing DNS lookups?
Yes. I have some rules for Reverse DNS and ip blacklisting.
But this was one of my first suspicions, and when I run 'nslookup' I
don't get such delays. Also, my home ip is contacting my server
constantly, so I would expect DNS to have cached that lookup many
times over, but even from home I get a 60-second delay from 'telnet
mailhost smtp'
Is it possible that sendmail goes through a different path to DNS than
nslookup, and that's where the delay is coming from?
Thanks,
Brian
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