Unknown User Error when using Sendmail

[someone_4]

If you can send a message to yahoo.com that means that you can resolv to yahoo.com you might want to look at your mail relay for the problem.

Richard

[Clemens van Everdingen]

Hi,

Do you get the similar output from this:

[root@webserver log]# nslookup yahoo.com
Server: resolve1.hccnet.nl
Address: 62.251.0.6

Non-authoritative answer:
Name: yahoo.com
Addresses: 66.218.71.112, 66.218.71.113

C.

[Jeff Paciolla_1]

I might have misunderstood the question earlier. I can send emails to username@yahoo.com from my own username@companyname.com, but if I try to send an email to username@yahoo.com from the HP-UX box it does not work.

The only emails that work from the HP-UX box are ones that go to a local address within my company's domain.

Thanks
Jeff

[Clemens van Everdingen]

Hi,

Can you post the output from nslookup dallasmail !!

C.

[Clemens van Everdingen]

Hi again,

Can you also do a nslookup from dallasmail to airmessage.net ?

C.

[Jeff Paciolla_1]

nslookup for dallasmail:

#nslookup dallasmail
Using /etc/hosts on: pikachu

looking up FILES
Name: dallasmail
Address: xxx.xx.xx.xx (replaced value)

unfortunately i can't do an nslookup on the dallasmail server because I don't have the rights to that box, i am trying to get someone from Dallas on the line right now.

Thanks
Jeff

[Jeff Schussele]

Hi Jeff,

We having fun yet?
The problem sure appears to be DNS-related. It may be that your local DNS servers are misconfigured or your name resolution is not optimal.
There may be a temp way around this - double relaying as follows:

8773443591@airmessage.net@dallasmail

This should force the relay to resolve the airmessage.net address. Note: this is not a recommended solution as it breaks spamming rules, but it can point out that local DNS is at fault here.
Your /etc/resolv.conf & nsswitch.conf should be set as earlier mentioned.

HTH,
Jeff

[Clemens van Everdingen]

Hi,

Please post the output from:

# echo test | sendmail -v 8773443591@airmessage.net

C.

[Jeff Paciolla_1]

To All - I appreciate all the effort that was given on my behalf (points will be awrded trust me), but I have just succesffuly sent a message to my pager using a different exchange server, which leads me to believe that the problem resides with the box in Dallas and not my HP-UX box.

Thanks again
Jeff

[someone_4]

Whoo hoooo!!!
so everything is working.
you can sendmail and resolv now. =)

Good job Team ITRC.HP
another satisfied customer =)

Richard

[Clemens van Everdingen]

Right ....

Al effort seems to have helped you out.
Hit the dallas administrator :-)

Going to bed :(

See you all.

Regards,
Clemens