Setting up mail(Basics)

[Kevin Loynds]

I have 3 HP9000 K servers with a D server that is running Omniback. I getting mail messages with the subject Postmaster notify: Cannot send message within 5 days, Name server timeout. Any idea what I missed with my setup?

Thanks
Kevin Loynds
Unix System Admin.

[rajsri]

Did you have mail server or all are peer mail systems , ie mails are ssent between the systems .
If you have mail server then your mail client should be able to ping to mail server with full qualified host name .
and also you may look for the /etc/sendmail.cw file for config .

[Rick Garland]

The DNS or /etc/nsswitch.conf sounds like the culprit. Are you able to resolve the systems via nslookup? Can you resolve using the IP address and the hostname? You will want to receive the Fully Qualified Domain Name back as the response.

The sendmail.cw file is a good place to see if the domain is to be accepted.

The BAT book (O'Reilly) is a very good and through source of info.