Outgoing mail.. will not go external..

[dfgu]

Hello.. I'm having trouble sending out email.. Here is my delema...

When I'm outside of the company, and I set up Pop mail, I can send out email only to the internal email. But once I try to send out external (yahoo.com), it gets bounced back to me saying that email address couldn't be found. What am I doing wrong here? is there a setting in exchange I should change?

Any help would be appreciated...

Thanks..

 

[jfinley]

Are you using the smtp server given by the ISP?