relaying issues with exchange 2000

[lsgtechuser]

I recently found out our exchange server (Exchange 2000)was setup to allow relaying for anyone. I locked it down by changing the relay restrictions to only allow people from the internal subnet to relay.

We have a few employees that work off site and need to be able to send e-mails (by relaying) through our server. I have the checkbox checked that says "Allow all computers which successfully authenticate to relay, regardless of the list above" which i thought would enable them to authenticate and be able to send, but apparently it doesn't.

Does anyone have any ideas on how to configure exchange 2000 to allow these certain people to relay if their ip addresses are constantly changing? Any help would be greatly appreciated.

 

[vic102482]

How are they tying into the server? Best solution and easiest fix for that would be OWA but you did hit the right setting with the "allow anyone to relay...authenticicate" question is are they authenticicating somehow to the server, or simply trying to send an smtp message through your server.

 

[lsgtechuser]

Their outlook is set up to authenticate on the outgoing (smtp) server. For some reason it still doesn't allow them to send e-mails they get an error message 5.7.1
denying relaying.

On the virtual SMTP server under Authentication (on the access tab), only "Anonymous Access" is checked. Would this make it so you can't authenticate? Should I make sure "Integrated Windows Authentication" is checked as well?