Your post doesn't add up. Outlook Express cannot make Exchange account
connections so you either are not using an Exchange account connection in
Outlook as well or you are using an alternative protocol like POP3 or IMAP.

Is the Exchange server itself configured to route the messages to the
Internet or not?
Did you install Outlook 2000 in Workgroup/Corporate mode or in Internet Mail
Only mode?

You're probably aware of this already, but things are very outdated in your
scenario.

--
Robert Sparnaaij [MVP-Outlook]
Coauthor, Configuring Microsoft Outlook 2003
http://www.howto-outlook.com/
Outlook FAQ, HowTo, Downloads, Add-Ins and more

http://www.msoutlook.info/
Real World Questions, Real World Answers

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"rowiga" wrote in message
...
I replaced my Win98 client with an XP Pro box. The server is running NT4
and
the mail server is running Exchange 5.5. I installed Outlook 2000 and
configured it the same way it had been on the Win98 machine but I can't
send
any mail to an internet mailbox. I can send mail to other mailboxes on our
network but nothing outside. Outlook will receive internet mail or from
within the shop.

I tried Outlook Express which has no trouble sending internet email. When
I
initially launched Express I had it to use the same settings I have setup
for
Outlook and it worked with no changes.

What needs to be done?

Any help appreciated.
Bob