HELP Problem with sendmail.

[Jonathan777]

Hi to all.

I get this message on the screen every 3 to 5 mins,

XXXXXX sendmail [1234]: unable to qualify my domain name (XXXXXX)-- using short name.


XXXXXX = being the server name.

Why do i get this everytime? How do I set my domain name?
How do I find out what domain is already set?
I need to also find out what my DNS address is?

Thanks in advance.

 

[NavinB]

Hi,
U can use nslookup command to find out the IP address of your domainname server.When u give the nslookup command it displays the nameserver,its IPaddress and its domain name.
Edit the above info in the file /etc/resolv.conf as
domain <domainname>
nameserver <IP address>
And domainname command displays your current domain.
See if this helps....

 

[lumberg]

NavinB, Dont you need to bounce the inetd daemon after making those changes??

Dennis

 

[Jonathan777]

How do I bounce the inetd. The sendmail messages still continue to exist.

 

[NavinB]

Hey,
try to run this command
/usr/lib/mail/sh/check-hostname
this command checks if sendmail can determine the system's fully-qualified host name

 

[lumberg]

to bounce the daemon

ps -ef |grep inetd

kill -HUP <the PID>

 

[Jonathan777]

NavinB,

I dont have a check-hostname file in my ~/sh/check-name.

Jon

 

[NavinB]

Hi Jon,
In that case, run nslookup command on the server and then give the IP address of the server on the prompt.It should display the fully-qualified hostname.One more thing,do u have the server configured on the DNS?If not,then do so.
After that u restart the sendmail daemon as :-
#/etc/init.d/sendmail stop
#/etc/init.d/sendmail start
See if this helps.....

 

[Jonathan777]

NavinB,

My nslookup does not seem to be working. It hangs up when I type in nslookup. This problem happened after I bounced the inetd deamon. How do i restart this process?
Thanks.

-Jon

 

[NavinB]

Hey,
To restart the inetd daemon u have to give
kill -HUP <the PID>
but if u are facing some problem then use
kill -9 <the PID>
and then start the inetd daemon using the command
/usr/sbin/inetd -s
See if this helps....

 

[Jonathan777]

NavinB,

I did the whole restart inetd process but still cannot seem to get my nslookup to work. ??? Strange.

JOn

 

[NavinB]

Hey,
1)Do u have a /etc/resolv.conf file having nameserver info?
2)are u able to ping nameserver from your server?

 

[Jonathan777]

NavinB,

OK the nslookup works now. The resolv.conf had an # in front of the nameserver. Ok now what do we have to do to make this work again? When I type the nslookup command from my server I get an default server and an address. However when I enter the Ip of my current server
i get &quot;can't find XXX.XX.XXX.XX: Non-existent host/domain&quot;

Could this be a problem?

A quick note: In my resolv.conf file i have two entries.
One is the nameserver and the ip
and the other is an name and ip of another nameserver.

is this ok?

 

[NavinB]

Hi,
Two entries are ok.No problem.
The problem here seems to be that your server has not been configured on DNS.So first have it configured.

 

[Jonathan777]

NavinB,

Thanks for all your help. Do u know where I can find more info on dns conf.

Thanks,

Jon

 

[NavinB]

U don't have to make any changes on your server but have just to add an entry for your server(IP address and hostname ) in the DNS server.First try to find out your DNS server.

 

[lotmueller]

Hi,

to switch of appearing the message on colsole do the follwing:

navigate to /etc/hosts

modify the entry of your local machine:

<hostname> <x.x.x.x> .

The point is very important for sendmail, now it can rsolve its one name.

Try it, it should work.

cheers

Lothar