Bind problems of a beginner

[Kevin Darcy]

Tom Condon wrote:

> ns2.condon.com is in fact down, but I doubt that I am getting that much
> traffic.  Also, ns1.condon.com is quite a fast machine.  I do remember
> reading somewhere that mailserver's request for a domain lookup can time
> out too quickly.  Is this correct?

Yes, I think that was a major reason why sendmail added the ability to tune
resolver timeouts in 8.10(.1?). But you can't make everybody tune and/or
upgrade their mail servers, so in the meantime perhaps you should add more
nameservers so that the failure of 1 won't impact your ability to send mail so
severely.


- Kevin

>
>
> In article <945k28$nri at pub3.rc.vix.com>, Kevin Darcy
> <kcd at daimlerchrysler.com> wrote:
>
> > Well, ns2.condon.com is in the condon.com delegations but you're not
> > advertising it in your domain's NS records and it doesn't appear to be
> > responding. Perhaps queries are timing out as nameservers try the dead
>
> > nameserver, followed by ns1.condon.com, which is perhaps getting
> > overloaded at
> > times because it's doing twice as much DNS traffic as it should be (?)
> >
> >
> > - Kevin
> >
> > Tom Condon wrote:
> >
> > > In article <945ftp$mjc at pub3.rc.vix.com>, Kevin Darcy
> > > <kcd at daimlerchrysler.com> wrote:
> > >
> > > > Modern versions of sendmail check the domain name of the sender as an
> > > > anti-spam measure. It's not a "problem" of sendmail; rather, a
> > > > feature.
> > > >
> > > > Note that the lookup sendmail would be doing initially is an MX
> > > > record
> > > > lookup. Is that what you tested? Only if the MX lookup failed would
> > > > sendmail issue an A record lookup (the default record type for
> > > > nslookup).
> > > >
> > > > Providing the *real* domain name would greatly assist in
> > > > troubleshooting
> > > > your problem.
> > > >
> > >
> > > the domain is "condon.com"
> > >
> > > --
> > > Thomas P. Condon
> > > Condon Consulting Services, Inc.
> > > 635 Tennessee Street #306
> > > San Francisco, CA 94107
> > > 415-431-9949
> >
> >