Sendmail - Undeliverable

[orbiton]

When I send a mail from my PC via the mail server to external address it gets delivered, but when I send it via the sun server I get Undeliverable message.

I get sen mail from the sun server to local host which will be delivered.

Is there any thing I need to do to have my mails delivered externally?

 

[Mag0007]

first trying emailing a user on your server.

 

[orbiton]

All mails to the local users goes, just mails going to an external address fails

 

[zxcdf5je]

i am facing the same problem.. but reverse..i am not able to get mails from external domains on sendmail..any idea?
other users on that server are getting the mails from external domain..i am so confused..
Help needed