Hi
Today my sendmail server broke, out of the blue.
It runs on a dialup connection, so it just queues mail
coming from the internal network destined to an outside
address (run like this: sendmail -bd -om).
When the link is up I force a queue run by doing 'sendmail
-q'.
This has worked for months without a problem, but as of this
morning it doesn't anymore. Sendmail deferres all mail with
a hostname lookup failure:
Deferred: Name server: smarthost.domain.com.au: host name
lookup failure
The hostname it apparently can't resolve is that of the
smart relay defined in sendmail.cf like this
DSsmtp:smarthost.domain.com.au
However, that host resolves fine, I can ping it, etc. Not
only does it resolve through DNS, there is also an entry for
it in /etc/hosts just in case (and the ip's match :). So it
resolves regardless of the ppp0 interface being up or down.
If I change the smart relay host entry in sendmail.cf to
null (e.g. DS ), Sendmail delivers mail fine by connecting
directly to the destination mail host. DNS appears to work
there.
I'm at a total loss what the problem could be, so if anyone
could give me a clue I'd be grateful.
Regards,
Matthias
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Matthias Oertli [EMAIL PROTECTED]
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