🚀 go-pugleaf

Hello, IBM AIX's user and system operators...

I am a network manager of Chung Ang University.
I am wonder how sendmail work.
I am setup my system to domain name server with CAU host's information.
But mail exchanger does not work.
So I can not post mail to some area.
Normal mail works well.
For examples, mail to hostinfo@psi.com does not work well.
My system configuration is below.

		RS/6000 320 & 520 & 32H
		AIX 3.2.5
		DNS and NIS was setup.

output from my system)
% 
% mailx -v hostinfo@psi.net
Subject: mail test
This is a mail test...
If you get this, please ignore!!!
.
Cc: 
netmgr... setsender: uid/gid = 204/11
hostinfo@psi.net... Connecting to psi.net.tcp...
hostinfo@psi.net... Connecting to psi.net (tcp)...
hostinfo@psi.net... Host unknown                        <--- does not work
/home/netmgr/.forward: line 1: netmgr... forwarding to moonhunt
Saving message in /home/netmgr/dead.letter
/home/netmgr/dead.letter... Sent
% 


But in nslookup program, it's information will be found.
% nslookup
Default Server:  loopback
Address:  127.0.0.1

> set type=mx               <=== Mail exchanger information found
> psi.net
Server:  loopback
Address:  127.0.0.1

Non-authoritative answer:
psi.net preference = 2, mail exchanger = srmftp.psi.com
psi.net preference = 4, mail exchanger = worldlink.worldlink.com
psi.net preference = 0, mail exchanger = psi.com

Authoritative answers can be found from:
PSI.NET nameserver = NS.PSI.NET
PSI.NET nameserver = NS2.PSI.NET
PSI.NET nameserver = NS5.PSI.NET
srmftp.psi.com  inet address = 38.145.204.4
worldlink.worldlink.com inet address = 38.8.1.2
psi.com inet address = 192.67.6.2
NS.PSI.NET      inet address = 192.33.4.10
NS2.PSI.NET     inet address = 192.35.82.2
NS5.PSI.NET     inet address = 38.8.5.2
> 

I was setup "OK ALL" in /etc/sendmail.cf.

Please answer to me...
Thank your for your reading.
===============================================================================
        Name : HyunSeog Ryu                 moonhunt@KRCAUCC1.BITNET
        Task : Network Manager                      @dragon.nm.cau.ac.kr
        Zip# : 156-756                              @HiTEL
        Address :                                   @PC-Serve
               Computer Center, Chung-Ang Univ.
               221 Heuk-Seok-Dong Dong-Jak-Gu          ^|^
               Seoul, South Korea                       -
        Tel  : +82-2-810-2484               Major : Computer Science
===============================================================================