HPlogo Configuring and Managing MPE/iX Internet Services > Chapter 10 Sendmail for MPE/iX

DNS Issues

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The number one cause of Sendmail installation problems is due to improper system naming and/or a lack of DNS entries describing your HP e3000. Please verify the following before you attempt to run Sendmail for the first time:

  • /bin/uname -n should report your HP e3000 hostname as a single token, i.e., "JAZZ" instead of "JAZZ.EXTERNAL.HP.COM". If you do not see a single token hostname, you must configure a proper hostname by using :NMMGR.

  • /SYS/NET/RESLVCNF must contain a single "domain" statement that defines the domain part of your HP e3000's fully qualified hostname. For example, /bin/uname -n should display "JAZZ" and /SYS/NET/RESLVCNF should contain a "domain external.hp.com" statement.

  • /SYS/NET/RESLVCNF must contain one or more "nameserver" statements which specify the DNS server IP addresses that your HP e3000 will be querying to resolve host names. It is not necessary to run a DNS server such as BIND on your HP e3000 itself.

  • Your HP e3000 must be defined within the DNS nameserver databases as having a valid "A" record that maps the HP e3000's hostname to an IP address.

  • Your HP e3000 must be defined within the DNS nameserver databases as having a valid "PTR" record that maps the HP e3000's IP address to a hostname.

Sendmail for MPE/iX is distributed with a convenient script that you can run to check all of the above DNS configuration issues and more:

  1. :HELLO SERVER.SENDMAIL

  2. :XEQ SH.HPBIN.SYS -L

  3. shell/iX> /SENDMAIL/CURRENT/bin/dnscheck

The dnscheck script will instruct you how to fix any problems that it detects. After making each fix, keep rerunning the script until no more problems are found.



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