Michael Monnerie:
> On Donnerstag 27 August 2009 Wietse Venema wrote:
> > And this was logged when a reverse hostname resolved to the wrong IP
> > address:
> >
> > ? ? Aug 26 00:26:12 spike postfix/smtpd[13393]: warning:
> > 61.135.132.106: address not listed for hostname
> > relay2nd.mail.sohu.com
>
> I just found a good logging example with the nfs server:
> rpc.mountd: Fake hostname ipmi-p4u.zmi.at for 212.69.162.206 - forward
> lookup doesn't exist
> That statement makes it clear, and would be a nice message for postfix
> also.
It is good to see that you have learned to read logfiles.
I think that the existing messages are adequate:
1.2.3.4: address not listed for hostname example.com
1.2.3.4: hostname example.com verification failed: Non-recoverable failure
in name resolution
The "Non-recoverable failure in name resolution" portion is provided
by the system library; there are other reasons that might be logged
here instead. This text may not be as "pretty" as what you suggest,
but it is more precise than simplistically claiming "forward lookup
doesn't exist" (apart from the fact that the text is nonsensical).
If you had read the Postfix warning messages, then you would not
have lost time solving your DNS problem.
Wietse
