What does findns error (2) ... indicate?

[Darrell Shane]

We are running bind 4.9.5-rel on our Internet gateway machine 
(PPP dialup account).  Our ISP's DNS machines' IP addresses 
are listed in our named.boot file.  Also, we use diald.  

I've noticed the following messages which I don't understand.

Jul 13 15:03:16 qual-pro named[122]: sysquery: findns error (2) on
G.ROOT-SERVERS.NET?
Jul 13 15:03:16 qual-pro named[122]: sysquery: findns error (2) on
F.ROOT-SERVERS.NET?
Jul 13 15:03:16 qual-pro named[122]: sysquery: findns error (2) on
I.ROOT-SERVERS.NET?
Jul 13 15:03:16 qual-pro named[122]: sysquery: findns error (2) on
E.ROOT-SERVERS.NET?
Jul 13 15:03:16 qual-pro named[122]: sysquery: findns error (2) on
D.ROOT-SERVERS.NET?
Jul 13 15:03:16 qual-pro named[122]: sysquery: findns error (2) on
C.ROOT-SERVERS.NET?
Jul 13 15:03:16 qual-pro named[122]: sysquery: findns error (2) on
B.ROOT-SERVERS.NET?
Jul 13 15:03:16 qual-pro named[122]: sysquery: findns error (2) on
H.ROOT-SERVERS.NET?
Jul 13 15:03:16 qual-pro named[122]: sysquery: findns error (2) on
A.ROOT-SERVERS.NET?
Jul 13 15:03:30 qual-pro named[122]: sysquery: findns error (2) on
ns2.nj.exodus.net?
Jul 13 15:03:30 qual-pro named[122]: sysquery: findns error (2) on
ns.nj.exodus.net?

I don't understand what an findns error (2) means.  I would appreciate any
help in 
resolving this problem.

By the way lately, some of our users have been experiencing intermittent
problems 
emailing (both locally & externally).  They receive a "No transport
provider was available 
for delivery to this recipient."  message.  I have a suspicion that it is
related to the 
dns problem.  Sendmail (our mail server) is configured to queue the mail
and deliver it 
every 15 minutes.

Thank you,
Darrell Shane
dshane at qual-pro.com