BIND 9.1.0 and Sendmail 8.9.3 on Solaris 2.7?

[Leonard Hermens]

Hi,

I am running BIND 9.1.0 and Sendmail 8.9.3 on Solaris 2.7. (Details below)

We are getting the following message for a valid domain lookup (as 
confirmed with a lookup using "host"):

Feb  1 13:43:55 lew sendmail[12301]: NAA12301: ruleset=check_mail, 
arg1=<iamperson at validdomain.com>, relay=ns.potlatchcorp.com [128.2.30.31], 
reject=501 <iamperson at validdomain.com>... Sender domain must exist

Sometimes, but not always, we can run a "host" lookup on a domain name and 
then sendmail will receive the email, but in the meantime, a lot of email 
is being rejected apparently at random.

Is sendmail 8.9.3 incompatible with BIND 9.1.0 or do I need to do something 
special to ensure that sendmail can use the resolver?  I know that this may 
not be an issue with BIND per se, but I would like to hear if anyone is 
having an issue with this or not.

-- Leonard

Details:

BIND 9.1.0 is built with gcc version 2.95.2 with default configuration.

/etc/resolv.conf contains:
domain potlatchcorp.com
nameserver 127.0.0.1

------------------------------------------
/etc/named.conf contains:
options {
      directory "/var/namedb";		
      pid-file "named.pid";		
      allow-query { any; };		
      forward only;
      forwarders {128.2.30.32;};            // NT box
};

zone "." { type hint; file "root.hint"; };

zone "0.0.127.in-addr.arpa" {
      type master;
      file "localhost.rev";
      notify no;
};

zone "potlatchcorp.com" {
      type slave;
      file "potlatchcorp.com.bak";
      masters { 128.2.30.32; };
};

zone "2.128.in-addr.arpa" {
      type slave;
      file "2.128.in-addr.arpa.bak";
      masters { 128.2.30.32; };
};

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Sendmail 8.9.3 configurations:

divert(0)
VERSIONID(`@(#)lew.potlatchcorp.com.m4  8.9.3 (Berkeley) 10/29/1999')
FEATURE(access_db, dbm /etc/mail/access)dnl
FEATURE(use_cw_file)dnl

divert(0)dnl
VERSIONID(`@(#)lew.potlatchcorp.com.mc   8.9.3 (Berkeley) 10/29/1999')
OSTYPE(solaris2)dnl
DOMAIN(lew.potlatchcorp.com)dnl
FEATURE(relay_entire_domain)dnl
MAILER(local)dnl
MAILER(smtp)dnl
define(`confME_TOO')dnl

--------------------------------------------