🚀 go-pugleaf

HELP!
Environment:
I am currently running sendmail 5.59 on a VAX 11/750 under 4.3 BSD.
I am also running named 4.8.
Problem:
When sending mail to a particular site, I receive the following error:
550 hostname... Host unknown
Fact:
The hostname exists and has a valid number.
Verified by running nsquery and nslookup.
Fact:
Other internet hosts can be found and mail sent via SMTP.
Verified by sending mail using the verbose option.  (numerous sites and times)
Fact:
I use the following rules to isolate tcp sites:
> # Well it isn't a "known" host lets try to find it
> R$*<@$+.UUCP>$*	$1<@$2>$3			Just drop the .UUCP
> # Look for host name using named
> R$*<@$+>$*		$:$1<@$[$2.$]>$3		ask named to resolve
> R$*<@$+.>$*		$:$1<@$[$2.$]>$3		recheck unresolved names
> # Send mail via tcp to known hosts
> R$*<@$+>$*		$#tcp$@$2$:$1@$2$3		user@domain
The hostname lookup SUCCEEDS!
Verified by running sendmail -bt ruleset 0 user@host where host is a known
alias.  The hostname is converted to its canonical hostname!
Fact:
I do not understand how named and sendmail can resolve the name AND the
host still be UNKNOWN!
Verified by this posting :-)

I am at wit's end.  Help me please.

Wanted:
	Solutions to the problem
	or
	Suggestions on how to isolate the problem

Aydin Edguer
ane@hal.cwru.edu