You have to specify a smart host in mail.cf. Below is an excerpt I got from sendmail howto. Also, as you know this is not an Oracle issue.

sendmail provides a simple method of configuring a smart host using the SMART_HOST feature; when implementing it in the Virtual Brewery configuration, we do exactly this. The relevant portions of our configuration that define the smart host are:

define(`SMART_HOST', `uucp-new:moria')
LOCAL_NET_CONFIG
# This rule ensures that all local mail is delivered using the
# smtp transport, everything else will go via the smart host.
R$* < @ $* .$m. > $* $#smtp $@ $2.$m. $: $1 < @ $2.$m. > $3

The SMART_HOST macro allows you to specify the host that should relay all outgoing mail that you are unable to deliver directly, and the mail transport protocol to use to talk to it.

In our configuration we are using the uucp-new transport to UUCP host moria. If we wanted to configure sendmail to use an SMTP-based Smart Host, we would instead use something like:

define(`SMART_HOST', `mail.isp.net')

We don't need to specify SMTP as the transport, as it is the default.

Can you guess what the LOCAL_NET_CONFIG macro and the rewrite rule might be doing?

The LOCAL_NET_CONFIG macro allows you to add raw sendmail rewrite rules to your configuration that define what mail should stay within the local mail system. In our example, we've used a rule that matches any email address where the host belongs to our domain (.$m.) and rewrite it so that it is sent directly to the SMTP mailer. This ensures that any message for a host on our local domain is directed immediately to the SMTP mailer and forwarded to that host, rather than falling through to our smart host, which is the default treatment.

 out of  found this valuable. Do you find this valuable?    

Hi,
In order for X-Windows to work the server needs to be able to contact your workstation on port TCP/6000. If it cannot get to your workstation then it cannot display the GUI. Do you receive any error messages?

You can tunnel X over SSH, check the documentation for your SSH client for more details.

Regards,
Jim

 out of  found this valuable. Do you find this valuable?    

Thanks much
One more question; in order to utilize the direct_io using init.ora filesystemio_option and setting it to "setall" on Linux, do we need to mount the jfs2 filesystem any differently or just by setting the filesystemio_option to "setall" at the database level, we would be able to leverage the direct io benefits?

Thanks

 out of  found this valuable. Do you find this valuable?