Re: [exim] Help with log message: failed to find host name

On 17/12/15 19:24, Scott Neader wrote:
> What's odd is that quite a few of the IPs listed in the log really do have
> proper rDNS (including all of them in the example above). When I do an
> nslookup on the same server, they all resolve fine.
>
> Any pointers as to what might be going on here?

My best guess is that your DNS is flaky. Can you afford to
packet-capture for long enough to see one such going past?
UDP _and_ TCP ports 53.
--
Cheers,
Jeremy