On Wed, 14 Jan 2004, Sam Varshavchik wrote:
Jon Nelson writes:
> I see lines that look like this infrequently: > > Jan 14 07:38:08 honker courierd: newmsg,id=00007621.40054640.00001C1C: > dns; localhost (softdnserr [::ffff:127.0.0.1]) > > What does the softdnserr mean? Why don't I see it with every message?
It means that one of the following things has happened when trying to resolve the connecting IP address backwards and forwards, via DNS:
ÃÂÂ The DNS server did not respond
ÃÂÂ The DNS server responded with a TEMPFAIL error indication
ÃÂÂ The forward and reverse DNS does not match
If your local DNS server cannot handle forward/reverse DNS resolution for 127.0.0.1, then something is seriously broken.
OK, that helps. It's my ISP's DNS, BTW (enough acronymns?)
The 'localhost' refers to what (courierd?) was looking up,
No, that was the HELO hostname supplied by the ESMTP client.
and the [::ffff:127.0.0.1] refers to what, then?
The connecting IP address.
I also have loglines that do not have 'localhost' but some other, external host and I still have (softdnserr [::ffff:127.0.0.1]).
Some other application is connecting, and using a different HELO command.
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