Relaying problem
 

I have a problem with sendmail SMTP authentication....it works well from my LAN, but not from elsewhere.

Example:
If I configure Outlook Express to connect to 192.168.0.100 sendmail requires SMTP authentication....of course I connect from my LAN to the mail server, but if I configure Outlook Express to connect to mail.example.com(the same server) then sendmail doesn't require SMTP authentication.

Anyone knows what to do?

Thanks!!!