Question : Cannot connect to Exchange SMTP from outside intranet

Hi,

I have a single machine Exchange 2003 set up. It has been configured to be closed for relaying unless the computer is authenticated. I am connecting to it through POP/SMTP on Outlook 2003. I selected the option "My outgoing server requires authentication" and left the option as same credentials as incoming server.

The Outlook client works fine when I am connecting to it internally through local IP. But when I dial up and connect to it through public IP, I am able to download mail but not allowed to relay when sending email.

I have a PIX firewall but the POP and SMTP ports for my exchange servers are already opened.

Any ideas?

Answer : Cannot connect to Exchange SMTP from outside intranet

http://support.microsoft.com/default.aspx?scid=kb;en-us;275575

is this ur problem?