Exchange Server No Longer Talks To UNIX Servers

Exchange Server No Longer Talks To UNIX Servers

Post by Rich Matheis » Wed, 04 Mar 1998 04:00:00

>We recently moved our DNS server and our Exchange server.  The IP addresses of
>both boxes changed as a result.  Now the Exchange server cannot send mail to
>internal UNIX servers.  After a day or two, the mail bounces back with either
>get "host unreachable" or "host unknown".

>It appears DNS is correctly configured on the Exchange server.  When we ping a
>UNIX server, it knows the correct IP address.  Any ideas what the problem
>could be?

Can you run the RESTEST tool (on the Exchange server CD in the
Support\Utils\i386 directory) from the Exchange server and does it
resolve the e-mail domain name and return the correct list of hosts?

Ping only establishes addressability (it uses only the "A" records),
not the resolution of MX records to addresses.

Richard Matheisen                           Wang Laboratories
Microsoft Certified System Engineer         Tewksbury, MA USA


1. unix Pop server connectivity to exchange server through firewall

I am in the process of setting up exchange behind our firewall and would
like to know how to have exchange receive and send mail
through our pop server outside the firewall instead of people accessing the
pop3 server directly outside the firewall through outlook.
we have set up exchanges pop3 connector to
connect to the pop3 but it is not working.   Here is the error I get:

did not reach the following recipient(s):

The recipient name is not recognized

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