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Assistance with IP Addressing?

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The Question is:

TCPIP/SMTP:   I have an AlphaDS20E running an Oracle Database, I am attempting
 to use SMTPmail to keep me informed after hours of how batch jobs are doing
 (completion, or not).
The host uses an internal 10.30.x.x address. I can send SMTPmail out to the
 internet successfully (log says I'm handshaking with outside hosts).  However,
 "reverse-lookup" on remote sites gives me an error;
recv buf=553 5.1.8 <system@miller.markelsw.markelcorp.com>...
Domain of sender address system@miller.markelsw.markelcorp.com does not exist\
 #  and SMTPmail is rejected.
I have set config smtp /substitute=name="markelcorp.com" and internet mail
 works, however, in-house mail fails (cmarkis@markelcorp.com), since SMTP
 thinks mail is to local host, instead of corporate mailserver.  I have set
 recommended logicalsper your sit
e to force SMTPmail, also.  I have tried the "/zone=" option, I have tried
 "/alternate=".  Is there a specific combination that will work, allowing the
 Internet to think I'm the "top-level domain", while the in-house sees me as a
 "sub-level domain" ????

The Answer is :

  Please contact your network management organization for assistance in
  determining the correct network-specific addresses for configuring your
  DNS/BIND and SMTP gateway settings.  For details on configuring TCP/IP
  Services, please see the TCP/IP Services management documentation.
  As for your choice of IP addresses:
   "The Internet Assigned Numbers Authority (IANA) has reserved the
   following three blocks of the IP address space for private internets:        -  (10/8 prefix)      -  (172.16/12 prefix)     - (192.168/16 prefix)"
  Hosts within these reserved are not permitted to connect into the
  Internet, without using some form of address translation mechanism.
  IP address translation would have to be performed within the context
  of a router or router-firewall box.  Your network management
  organization should be aware of the need for these devices or for
  a change of IP addresses, if your organization makes regular use of
  these reserved IP address blocks.
  Please see rfc1918 for details.

answer written or last revised on ( 21-NOV-2002 )

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